Has anyone run into this problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

harrdawg54 · 06-30-2009, 02:12 AM

I swapped my original 350 with one from a '92 chevy truck and now it sits back too far. The distributor is touching the firewall and the valve covers are only 1/2" or so away. I am going to move everything up 2 inches, I have converted to electric fans so I have no issues with clearance. I just didn't know if this is something anybody else has run into?

OxydizedBlue · 06-30-2009, 02:53 AM

I have a 4x4 and my engine sits just like yours. It is my understanding that the two wheel drive motor mounts are up a couple inches.

Werewolf · 06-30-2009, 04:25 AM

When you swapped, did you end up using the 6 cylinder mount location? A '92 350's block mounts are in the same place as the original 350.

big_al_71 · 06-30-2009, 08:55 AM

you definetly used the wrong mounting holes...You have to move it forward and problem solved...

**chevy71super** · 06-30-2009, 09:15 AM

It looks like your truck is a 4 wheel drive so its probably in the right position. Its a common problem using an HEI. Mine was very tight, I had to cut a bolt off protruding from the firewall to get my HEI to work. the valve covers are also very close. If you move it forward you may need to mess with the drive shafts. An aftermarket distributor with a smaller cap should work fine. Doug

69GMCLonghorn · 06-30-2009, 09:55 AM

Any pics of the original engine and how it sat in there?

harrdawg54 · 06-30-2009, 03:49 PM

I mounted the new motor in the same location as the original one, I will look later today to see if I have any pics of the original motor before I pulled it.

mycool72 · 06-30-2009, 09:06 PM

You may have to drill holes in the crossmember to use the same mounts-but its not hard to do with a long drill bit.

harrdawg54 · 06-30-2009, 10:31 PM

OK....I found some pix of the motor pre-pull. They aren't that great of shots but you can see that the motor is back pretty far and I put in a few shots of the crossmember. I was just going to drill new holes in the frame move the whole crossmember up 2 2/4". If anyone has a better Idea, I am all ears.

harrdawg54 · 06-30-2009, 10:33 PM

Can you tell I had an oil leak?!

prostreetC-10 · 06-30-2009, 11:45 PM

That's crazy....how would you ever get a big block in there?

harrdawg54 · 07-01-2009, 12:05 AM

I know...I am just trying to fit a SB 350 and am having problems.

mycool72 · 07-01-2009, 08:34 AM

Can't you just unbolt it and move it forward? Looks like there are already holes there...or am i missing something?

harrdawg54 · 07-01-2009, 10:31 AM

there are only holes on one side, I am going to drill new ones on the other. Using those holes the motor will move up 2.25 inches, which should give me plenty of room. I would then just have to remeasure my drivelines, which sucks because I just had them redone. Live and learn I guess.

mycool72 · 07-01-2009, 12:28 PM

That does suck. I moved mine back 2 inches so I could use my driveshaft instead of having one made.

harrdawg54 · 07-03-2009, 01:04 PM

Just thought I would give an update. I moved everything forward yesterday and took my drivelines in today to get them the correct length. Now that the cab is back off I am going to replace the cab mounts while it's on it's back. Thanks to everyone for their help.

06-30-2009, 02:12 AM	#1
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Has anyone run into this problem I swapped my original 350 with one from a '92 chevy truck and now it sits back too far. The distributor is touching the firewall and the valve covers are only 1/2" or so away. I am going to move everything up 2 inches, I have converted to electric fans so I have no issues with clearance. I just didn't know if this is something anybody else has run into? __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

06-30-2009, 02:53 AM	#2
OxydizedBlue Registered User Join Date: Jun 2009 Location: Ellensburg, Washington Posts: 8	Re: Has anyone run into this problem I have a 4x4 and my engine sits just like yours. It is my understanding that the two wheel drive motor mounts are up a couple inches.

06-30-2009, 04:25 AM	#3
Werewolf Woof? Join Date: Jun 2005 Location: Raleigh, NC Posts: 276	Re: Has anyone run into this problem When you swapped, did you end up using the 6 cylinder mount location? A '92 350's block mounts are in the same place as the original 350. __________________ 1968 LWB CST BB 2004 Avalanche Z71 LT3. 2003 S-10 ZR2 (hers). 1997 Astro 1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck. 1997 Saturn - need gas mileage from something!

06-30-2009, 08:55 AM	#4
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: Has anyone run into this problem you definetly used the wrong mounting holes...You have to move it forward and problem solved... __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild

06-30-2009, 09:15 AM	#5
chevy71super Registered User Join Date: Jan 2002 Location: So Cal Posts: 658	Re: Has anyone run into this problem It looks like your truck is a 4 wheel drive so its probably in the right position. Its a common problem using an HEI. Mine was very tight, I had to cut a bolt off protruding from the firewall to get my HEI to work. the valve covers are also very close. If you move it forward you may need to mess with the drive shafts. An aftermarket distributor with a smaller cap should work fine. Doug __________________ 71 Cheyenne Super 4X4 SB 72 Cheyenne Super 4X4 SB 72 Cheyenne 4X4 SB

06-30-2009, 09:55 AM	#6
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: Has anyone run into this problem Any pics of the original engine and how it sat in there?

06-30-2009, 03:49 PM	#7
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Re: Has anyone run into this problem I mounted the new motor in the same location as the original one, I will look later today to see if I have any pics of the original motor before I pulled it. __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

06-30-2009, 09:06 PM	#8
mycool72 Registered User Join Date: Aug 2008 Location: Mansfield, TX Posts: 309	Re: Has anyone run into this problem You may have to drill holes in the crossmember to use the same mounts-but its not hard to do with a long drill bit.

06-30-2009, 10:31 PM	#9
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Re: Has anyone run into this problem OK....I found some pix of the motor pre-pull. They aren't that great of shots but you can see that the motor is back pretty far and I put in a few shots of the crossmember. I was just going to drill new holes in the frame move the whole crossmember up 2 2/4". If anyone has a better Idea, I am all ears. __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

06-30-2009, 10:33 PM	#10
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Re: Has anyone run into this problem Can you tell I had an oil leak?! __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

06-30-2009, 11:45 PM	#11
prostreetC-10 My Carbon Footprint Join Date: Oct 2008 Location: Orygun Posts: 5,527	Re: Has anyone run into this problem That's crazy....how would you ever get a big block in there? __________________ A quick "pedalfest" *Still getting loose (carb test)* 496 Initial fire up video!

07-01-2009, 12:05 AM	#12
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Re: Has anyone run into this problem I know...I am just trying to fit a SB 350 and am having problems. __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

07-01-2009, 08:34 AM	#13
mycool72 Registered User Join Date: Aug 2008 Location: Mansfield, TX Posts: 309	Re: Has anyone run into this problem Can't you just unbolt it and move it forward? Looks like there are already holes there...or am i missing something?

07-01-2009, 10:31 AM	#14
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Re: Has anyone run into this problem there are only holes on one side, I am going to drill new ones on the other. Using those holes the motor will move up 2.25 inches, which should give me plenty of room. I would then just have to remeasure my drivelines, which sucks because I just had them redone. Live and learn I guess. __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

07-01-2009, 12:28 PM	#15
mycool72 Registered User Join Date: Aug 2008 Location: Mansfield, TX Posts: 309	Re: Has anyone run into this problem That does suck. I moved mine back 2 inches so I could use my driveshaft instead of having one made.



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07-03-2009, 01:04 PM	#16
harrdawg54 Registered User Join Date: Apr 2007 Location: Sandpoint, Idaho Posts: 178	Re: Has anyone run into this problem Just thought I would give an update. I moved everything forward yesterday and took my drivelines in today to get them the correct length. Now that the cab is back off I am going to replace the cab mounts while it's on it's back. Thanks to everyone for their help. __________________ 1969 Chevy K20 Custom Camper 350, 4sp, 33's High on plans, Low on funds

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