Bed too high? What did I do wrong?

[mcbassin]

Originally Posted by PHAT TONY

The pic of the new cab mounts looks to me that the rubber is a little shorter than I've seen before.

This is exactly what I thought. To me it looks like the new bushing is aweful short.

[MAK191]

here is a good reference for the cab mounts and measurements. It was posted by Bruce in his build. http://67-72chevytrucks.com/vboard/s...318544&page=18
Hope he doesn't mind but here is the picture, it really helped me out.

[eightbanger]

A pic of my rear mounts after renewal. Your upper bushing looks squished.

[Shyguy]

Originally Posted by eightbanger

A pic of my rear mounts after renewal. Your upper bushing looks squished.

The back bushings on his cab look squished to me, also. I just replaced the one on my '67 and they look like yours.

I just snugged mine down without squishing them. I got them from Classic Parts and they look like yours.

[Boog]

You don't suppose he has the front and rear cushions swapped do you? Would make sense since they are different thickness. The rear one is thicker.

[domeier]

My front and rear mounts:

[domeier]

Hey - maybe you're supposed to inflate it?

[stomper]

Thanks for all your input guys! I REALLY appreciate it. Started to quote individuals but most suggest cab bushings. So...

This is the cab bushing set I installed:

http://www.summitracing.com/parts/ENS-3-4108G/

Instructions list a 0.1" taller sleeve in the rear cab position.

Poly bushing thicknesses as installed using dial calipers.

Core Support - 0.750

Front cab - 1.01

Rear cab - 0.875

I have the taller (by 1/8") bushing in the front cab position. Winner?

More pix with measuring tape:

[eightbanger]

Originally Posted by Shyguy

I just snugged mine down without squishing them. I got them from Classic Parts and they look like yours.

Yeah, good ol Classic Parts.

Originally Posted by domeier

Hey - maybe you're supposed to inflate it?

And with air bags that would be the complete air system.

[badwrench3]

Hey eightbanger,i am is the assembly stage (mock up) of my 69/72super/ls1,researching
bed assembly,came across your dilema.on your first post you show 5 pics of your bed.on the fourth pic of your post is the front bed perch,i am pretty sure your perch is on the frame backwards.the angle is down towards the cab.It should be level with your rear perch if you straight edge it the length of the frame rail.By reversing it you should gain some or all of the lowering distance you nedd to align the bed to the cab.

[eightbanger]

Originally Posted by badwrench3

Hey eightbanger,i am is the assembly stage (mock up) of my 69/72super/ls1,researching
bed assembly,came across your dilema.on your first post you show 5 pics of your bed.on the fourth pic of your post is the front bed perch,i am pretty sure your perch is on the frame backwards.the angle is down towards the cab.It should be level with your rear perch if you straight edge it the length of the frame rail.By reversing it you should gain some or all of the lowering distance you nedd to align the bed to the cab.

Stomper, is the OP badwrench not me...but I think you may have hit the nail on the head there.

[jtp67-72]

Originally Posted by badwrench3

Hey eightbanger,i am is the assembly stage (mock up) of my 69/72super/ls1,researching
bed assembly,came across your dilema.on your first post you show 5 pics of your bed.on the fourth pic of your post is the front bed perch,i am pretty sure your perch is on the frame backwards.the angle is down towards the cab.It should be level with your rear perch if you straight edge it the length of the frame rail.By reversing it you should gain some or all of the lowering distance you nedd to align the bed to the cab.

Noticed that but looks like factory rivots -maybe camera angle.....jim

[Boog]

Yeah, camera angle on that.

[badwrench3]

Hey stomper,i sent this earlier to the wrong person.from what i can see in your pics your front bed rail support perches seem to be installed backwards.i was just checking mine before i bolted them in, i positioned them reversed and it appears that it would lift the front of the bed up about the distance your having a problem with.unless it's one of those "obstical illusions"
badwrench

[jocko]

Hey Stomper, I'm jsut catching back up - wondering if you got this fixed. I see you've posted a few more pics since last time I checked - and it appears to me that the passenger side gap between the bed and cab is extremely small... With all the other stuff going on, I'm curious how the truck was before you disassembled? Did everything appear level then? Asking because that would dispel the bent frame idea - which seems like a possibility if nothing else is making sense. Regardless, I think that if you've eliminated any mis-steps in the re-assembly process, shimming the cab may be the best route. Have you compared all the cab mounts and rubber to confirm they are same size - and looked at the bed mounts to do the same. Personally, I would install small rubber shim on bed, then adjust cab with shims to square it up. Not sure what else to do.

[jocko]

Originally Posted by badwrench3

Hey stomper,i sent this earlier to the wrong person.from what i can see in your pics your front bed rail support perches seem to be installed backwards.i was just checking mine before i bolted them in, i positioned them reversed and it appears that it would lift the front of the bed up about the distance your having a problem with.unless it's one of those "obstical illusions"
badwrench

Ooooh GOOD EYE!!! I think you may be onto somethin there

[jtp67-72]

Factory rivots--bracket is right............jim

[67swb72klb]

my 72k10 the po put new cab mounts on had to do some shiming i have seen them come from the factory with them in there too

[mcbassin]

So have we found the solution to this problem yet? any updates?

[stomper]

I have been working on it some. Sorry no pix right now. (Getting ready for Christmas) It's going to end up being a number of little things. So far I have:

Swapped the bushings front-to-back into correct locations. This raised the back of the cab about 1/8"+.

I put an 1/8" shim in the rear bushing location. This gave me another 1/8"

I probably got ahead of myself because the bed didn't have the wood in the back corners. Putting that in tilted the bed sides forward a little. This didn't lower the front of the bed but it closes the gap between the cab and the top of the bed front panel.

I loosened all the bolts in the bed floor and pushed/pulled/bumped the pieces to get the bed closer to the cab.

A new problem I have now:

The panel gap between the back of the front fender and the front of the door is wide at the bottom. I'm hoping shims in the forward cab mount stack will take care of this.

Mak191: Thanks ALOT for the illustration and measurements. Looks like the rubber bushings are 1/4" (AFT) and 3/8" (FWD) taller than the poly bushings. So... shimming the cab higher is likely the real solution for my problem. I really don't like it that I'm having to make up the difference with shims. Seems like they should make the poly bushings taller.