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#1 |
71 GMC 454/TH400
Join Date: Dec 2005
Location: Blue Mound TX
Posts: 214
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Big Block Swaps simplified
Hello all, I have been gone for a while but I did manage to find time to get the 454 shoe horned into the farm truck. After talking with some folks I decided to just do it my way. I sat the 454 on the stock 350 mounts, but it sat a bit too far forward. So then I got to looking at this issues, jacked the motor up and swapped the frame mounts side to side. Slid the mounts towards the front of the slot and drilled the holes for the bottom bolts. It made for tight clearance with my headers but it all fits! I was thinking of making a swap book what do y'all think?
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"The bigger you are the harder you fall, the farther you walk the longer you crawl." |
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#2 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Big Block Swaps simplified
What are you going to run for exhaust manifolds or headers? That's usually the main trouble with using small block stands.
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I'm on the Instagram- @Gearhead_Kevin |
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#3 |
71 GMC 454/TH400
Join Date: Dec 2005
Location: Blue Mound TX
Posts: 214
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Re: Big Block Swaps simplified
I clearanced the frame stad a tad bit and had to slightly dimple the header tube a wee bit. It all fits great! But however I am unsure if the BB headers are going to work with the drop componets I bought.
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"The bigger you are the harder you fall, the farther you walk the longer you crawl." |
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#4 |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: Big Block Swaps simplified
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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#5 |
Registered User
Join Date: Apr 2003
Location: Central PA....In the Berg of Nisbet
Posts: 790
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Re: Big Block Swaps simplified
That is how they had the 454 in my K-20............Only problem was they cut some of the steel away on the plates where the motor mounts bolt to.........When we took the engine out, I wasn't too supprised when I seen that side was all cracked up from lack of structural strength. Luckly I have some extras to replace it.
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'72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck '71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel! '69 3500 GMC 305V-6/4spd, Still under reconstruction.......... Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!! |
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#6 | |
Registered User
Join Date: Jun 2002
Location: asheville, NC
Posts: 63
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Re: Big Block Swaps simplified
Quote:
JYD |
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#7 |
Senior Member
Join Date: May 2002
Location: hamilton,ohio,usa
Posts: 1,499
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Re: Big Block Swaps simplified
JYJ likes the CAPS.
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#8 |
71 GMC 454/TH400
Join Date: Dec 2005
Location: Blue Mound TX
Posts: 214
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Re: Big Block Swaps simplified
When working with limited funds and resources you do what you have to. I would have used big block stands if I could have found them. The clearance was miniscule not enough to hinder the performance of the mount, or effect exhaust flow in the header tube. I do know enough not to go hacking on a motor mount. This was a poor mans BB swap.
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"The bigger you are the harder you fall, the farther you walk the longer you crawl." |
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