454 swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71-8.5 GiMiC · 02-07-2007, 10:42 PM

Having problems lining up engine mounts to frame stands on my new big block installed today. Went the same route as Tx Firefighter suggested. Using 68-71 frame mounts and small block engine mounts. Can't get the engine back far enough to line up the holes. Need another 3/4 inch. Tried everything, loosen off all mounting bolts including tranny mount bolts. Pry bars etc. Anyone have any other suggestions before I drill more holes in the frame?

RACINJASON22 · 02-07-2007, 10:59 PM

I'm not real familiar with these truck mounts, some one may have a different idea but this is one I ran into on a buddies 69 nova. He put the mounts on the wrong side could not figure out why his engine sat back so far that the tranny cross member would not line up. He put it in that way modified the cross member runs drives fine, he asked me about it and we got to looking sure enough that was it. I'm not even sure if your truck mounts are able to be reversed but worth a look anyway. GOOD LUCK!

**LockDoc** · 02-07-2007, 11:56 PM

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From everything I've read that wont work. I guess I didn't see tx's thread on it.

LockDoc

71-8.5 GiMiC · 02-08-2007, 12:19 AM

Triple checked them before I put them in.

Bob Moore · 02-08-2007, 03:06 PM

You didn't state but I assume a 2wd and BB stands like Tx used. If that is the case, did you mount the stands in the forward location? I have a 454 in my 67 with plenty of room all around the engine - HEI, heads, and bell housing are. I used 72 mounts and towers but had NO problems.

Hope this helps - Bob

prostreet1967 · 02-08-2007, 03:39 PM

did u pull the driveshaft out it won't go back to far with the drive shaft in put a jack and a 2x4 under oil pan and it will lift motor and trans and u can roll it around but sounds to me like u need to use the front holes i have a 67 and im using the front holes no problem mounting engine but headers are hitting on the mounts

71-8.5 GiMiC · 02-08-2007, 10:35 PM

Yes, 2wd. Using the front holes.Driveshaft out.Got a couple more hands for help. Got it in there, but still had to grind the holes in the towers a little longer. Thanks guys.

02-07-2007, 10:42 PM	#1
71-8.5 GiMiC Registered User Join Date: Feb 2005 Location: B.C. Canada Posts: 9	454 swap Having problems lining up engine mounts to frame stands on my new big block installed today. Went the same route as Tx Firefighter suggested. Using 68-71 frame mounts and small block engine mounts. Can't get the engine back far enough to line up the holes. Need another 3/4 inch. Tried everything, loosen off all mounting bolts including tranny mount bolts. Pry bars etc. Anyone have any other suggestions before I drill more holes in the frame? __________________ 71 GMC Longhorn 70 Chevelle 73 Triumph 750 Bonnevelle Don

02-07-2007, 10:59 PM	#2
RACINJASON22 GEARHEAD Join Date: Jan 2007 Location: CENTRAL,PA Posts: 2,284	Re: 454 swap I'm not real familiar with these truck mounts, some one may have a different idea but this is one I ran into on a buddies 69 nova. He put the mounts on the wrong side could not figure out why his engine sat back so far that the tranny cross member would not line up. He put it in that way modified the cross member runs drives fine, he asked me about it and we got to looking sure enough that was it. I'm not even sure if your truck mounts are able to be reversed but worth a look anyway. GOOD LUCK! __________________ 72 SWB 2WD MY PROJECT 72 LWB 4X4 FUTURE PROJECT SUBSCRIBE HEREBOARD VENDORS HERE NORWOOD MEET SURVIVOR!

02-07-2007, 11:56 PM	#3
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,420	Re: 454 swap - From everything I've read that wont work. I guess I didn't see tx's thread on it. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

02-08-2007, 12:19 AM	#4
71-8.5 GiMiC Registered User Join Date: Feb 2005 Location: B.C. Canada Posts: 9	Re: 454 swap Triple checked them before I put them in. __________________ 71 GMC Longhorn 70 Chevelle 73 Triumph 750 Bonnevelle Don

02-08-2007, 03:06 PM	#5
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: 454 swap You didn't state but I assume a 2wd and BB stands like Tx used. If that is the case, did you mount the stands in the forward location? I have a 454 in my 67 with plenty of room all around the engine - HEI, heads, and bell housing are. I used 72 mounts and towers but had NO problems. Hope this helps - Bob __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

02-08-2007, 03:39 PM	#6
prostreet1967 Registered User Join Date: Oct 2006 Location: fort worth texas Posts: 395	Re: 454 swap did u pull the driveshaft out it won't go back to far with the drive shaft in put a jack and a 2x4 under oil pan and it will lift motor and trans and u can roll it around but sounds to me like u need to use the front holes i have a 67 and im using the front holes no problem mounting engine but headers are hitting on the mounts

02-08-2007, 10:35 PM	#7
71-8.5 GiMiC Registered User Join Date: Feb 2005 Location: B.C. Canada Posts: 9	Re: 454 swap Yes, 2wd. Using the front holes.Driveshaft out.Got a couple more hands for help. Got it in there, but still had to grind the holes in the towers a little longer. Thanks guys. __________________ 71 GMC Longhorn 70 Chevelle 73 Triumph 750 Bonnevelle Don



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