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Old 02-03-2021, 12:25 AM   #1
KQQL IT
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2wd swap

Recently got a 1982 2wd K5 jimmy

It's apparently been hit in right side hard at some point before me.
Frame is junk since found a 83 4wd frame.
Current state of confusion.

And since we're into it this far. Planning on a 1-1-1/2 inch section of the crossmember some tube A arms and bags.
Rear bagged 2 link

Is it possible to move the crossmember forward much without getting into the steering components?

BTW I'm really thinking these p-19 pins do more damage than good on these trucks.
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Old 02-03-2021, 11:07 AM   #2
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Re: 2wd swap

Yes the bagged truck i helped a kid build was fine that way. Although some people do have to slide the box forward too.

Incase you did not know. 4x4, and 2wd steering boxes are different. Something about different angle of operation.
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Old 02-03-2021, 11:15 AM   #3
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Re: 2wd swap

Quote:
Originally Posted by KQQL IT View Post
Recently got a 1982 2wd K5 jimmy

It's apparently been hit in right side hard at some point before me.
Frame is junk since found a 83 4wd frame.
Current state of confusion.

And since we're into it this far. Planning on a 1-1-1/2 inch section of the crossmember some tube A arms and bags.
Rear bagged 2 link

Is it possible to move the crossmember forward much without getting into the steering components?

BTW I'm really thinking these p-19 pins do more damage than good on these trucks.
Moving the x-member forward & up but not moving the steering seems like asking for trouble. I would do a frame 'Z' to move everything together for a better (more consistent) result.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 02-03-2021, 12:44 PM   #4
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Re: 2wd swap

Tie rods on the bottom of the steering arm with a bumpsteer kit is the plan for that.
Or a obs spindle which would accomplish the same thing.


As too the steering box I'm using our existing box.
The donor 4x4 box was gone.
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Old 02-03-2021, 12:56 PM   #5
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Re: 2wd swap

Quote:
Originally Posted by KQQL IT View Post
Tie rods on the bottom of the steering arm with a bumpsteer kit is the plan for that.
Or a obs spindle which would accomplish the same thing.


As too the steering box I'm using our existing box.
The donor 4x4 box was gone.
It's not just the TRE's & Bumpsteer concern. The Pitman arm + Idler will be @ a different height as well as fore/aft placement vs. OE.
I'm not saying things won't play well together but I would want to keep things as consistent as possible.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 02-03-2021, 01:37 PM   #6
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Re: 2wd swap

Looked at a few Z ing threads. Not feeling that at all.
My 17 year old got this pos jimmy and a tig welder.
So the possibilities are endless.
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Old 02-03-2021, 02:13 PM   #7
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Re: 2wd swap

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Originally Posted by KQQL IT View Post
Looked at a few Z ing threads. Not feeling that at all.
My 17 year old got this pos jimmy and a tig welder.
So the possibilities are endless.
Understandable. Some people won't cut a frame. I wouldn't either if it couldn't be done w/o retaining full strength.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 02-03-2021, 04:19 PM   #8
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Re: 2wd swap

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Understandable. Some people won't cut a frame. I wouldn't either if it couldn't be done w/o retaining full strength.

That isn't my issue with the Z my 68 was cut and stretched in like 74 I'm told.

Frame would need cut twice.
The z and then the core support.
Plus the engine mounts are all different.

Pass

Mild section drop spindles
Move the lower arms forward will achieve the look I'm after.

Appreciate the info.


This low low stuff is new territory
Always been a clip 2 coils and a flip it on all my C-10s
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Old 02-03-2021, 04:40 PM   #9
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Re: 2wd swap

Quote:
Originally Posted by KQQL IT View Post
That isn't my issue with the Z my 68 was cut and stretched in like 74 I'm told.

Frame would need cut twice.
The z and then the core support.
Plus the engine mounts are all different.

Pass

Mild section drop spindles
Move the lower arms forward will achieve the look I'm after.

Appreciate the info.


This low low stuff is new territory
Always been a clip 2 coils and a flip it on all my C-10s
Ok. Only moving the lower arms forward helps w/improving caster. That's different vs moving the entire x-member which changes upper a-arm/lower a-arm/spindle hub centers together.
Moving the entire x-member forward starts encroaching on the steering box/Pitman & Idler mounting centerlines.

My dually has 3" spindles, a 1.5" sectioned x-member, & PB tubular 1" forward lower arms w/bags. Previously it used .750" forward GM a-arms w/coils (1 coil removed).
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.

Last edited by SCOTI; 02-03-2021 at 04:53 PM.
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Old 02-03-2021, 05:32 PM   #10
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Re: 2wd swap

I wasn't sure about the x member or the A arms.
Just want to avoid the wheels back look.

With the 1.5 section you did. Was the steering input shaft into the left upper arm.
Looks like they might hit.
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Old 02-03-2021, 05:52 PM   #11
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Re: 2wd swap

Quote:
Originally Posted by KQQL IT View Post
I wasn't sure about the x member or the A arms.
Just want to avoid the wheels back look.

With the 1.5 section you did. Was the steering input shaft into the left upper arm.
Looks like they might hit.
Yes, they will interfere @ the front pivot/bushing. The bushing barrel OD for the later arms & aftermarket arms is too large (even Michigan Metalworks 'Dodger' series arms wouldn't clear).

The driver side upper from a 63-72 or 73-87 HD truck will clear w/a small c-notch. The HD bushings have a smaller footprint/OD & will clear but the a-arms front 'leg' still gets close when cycling through suspension travel. A small notch allows the required clearance.

Another option is to use a multi joint shaft assembly to clear. It would require a center bearing support. I did the notched x-member/notched HD bushing arm approach on mine as it's a cleaner look w/minimal extras (& recommended them to the people I sold notched x-members to).
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.

Last edited by SCOTI; 02-08-2021 at 09:49 AM.
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Old 02-03-2021, 09:00 PM   #12
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Re: 2wd swap

We start cutting this weekend..
Can't wait to watch my son learn this stuff. He's more into the fabrication part than then the truck
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Old 02-07-2021, 02:48 AM   #13
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Re: 2wd swap

Easier said than done.
But 1.5 inch section is cut and the kid is getting some filler down
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Old 02-12-2021, 11:55 AM   #14
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Re: 2wd swap

Fixing my cut off wheel wildin.
I believe my kid is on his way.
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Old 02-12-2021, 12:02 PM   #15
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Re: 2wd swap

Nothin' to it but to do it. I would agree he's getting it done.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 02-21-2021, 06:01 PM   #16
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Re: 2wd swap

A slight dilemma. The engine stands are aligning weird
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Old 02-22-2021, 10:45 AM   #17
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Re: 2wd swap

I had to do spacers on my old '68 when I did my first x-member so there's that option. What about tweaking the flanges slightly? Could that help?

On that set-up, the notched x-member & MM towers used were from a Square & placed between the 68's rails. I used some aftermarket tubular MM towers & made spacers to make up the difference. Unfortunately, I never checked the fit of the stock Squarebody x-member/MM towers before I started the mods.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 02-22-2021, 12:13 PM   #18
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Re: 2wd swap

We didn't check them either.
Those brackets where laying on the floor of the blazer when we got it.
If I vice gripped the top to the flange and pulled the bottom down with a C clamp it would come. But nothing lined up.
We where mocking up the fit after bolting the crossmember down.
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Old 02-22-2021, 01:03 PM   #19
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Re: 2wd swap

I havent had a problem with the towers not fitting when I sectioned a couple crossmembers. Assuming you did the crossmember correctly I would guess that the towers are off a different generation of truck. Did you try flipping them side to side?
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Old 02-22-2021, 03:21 PM   #20
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Re: 2wd swap

Quote:
Originally Posted by KQQL IT View Post
We didn't check them either.
Those brackets where laying on the floor of the blazer when we got it.
If I vice gripped the top to the flange and pulled the bottom down with a C clamp it would come. But nothing lined up.
We where mocking up the fit after bolting the crossmember down.
I'd tweak the flanges on the tower ends to see if it's possible to get them 'closer' & let the mounting hardware cinch them into the final position. If the hardware doesn't seem stressed/forced @ that point, I'd be fine w/calling it good. Or, as stated, if needed slip some .250" material between as spacers. Worked fine in my application.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 02-22-2021, 04:26 PM   #21
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Re: 2wd swap

Quote:
Originally Posted by tinydb84 View Post
I havent had a problem with the towers not fitting when I sectioned a couple crossmembers. Assuming you did the crossmember correctly I would guess that the towers are off a different generation of truck. Did you try flipping them side to side?
Correct? That maybe a stretch 1st go at a section
Flipping them made the mounts go sideways.

@scoti
We'll try that next if nothing else cooperates
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Old 02-22-2021, 05:29 PM   #22
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Re: 2wd swap

Quote:
Originally Posted by tinydb84 View Post
I havent had a problem with the towers not fitting when I sectioned a couple crossmembers. Assuming you did the crossmember correctly I would guess that the towers are off a different generation of truck. Did you try flipping them side to side?
Correct? That maybe a stretch 1st go at a section
Flipping them made the mounts go sideways.

@scoti
We'll try that next if nothing else cooperates
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Old 02-26-2021, 03:15 AM   #23
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Re: 2wd swap

Unbolted everything let it relax.
Gave the top flange some attitude and it's a bunch closer
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Old 02-27-2021, 11:23 PM   #24
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Re: 2wd swap

3/16 spacer was the answer.
Wouldn't cooperate with a ratchet strap pulling the rails together.
And I have no idea how the nuts got doubled up like that?!
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Old 02-28-2021, 02:09 AM   #25
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Re: 2wd swap

That should get it done.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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