Author Topic: small block to big block swap/whodunit?  (Read 7421 times)

Offline 07montecarlo

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small block to big block swap/whodunit?
« on: February 08, 2010, 06:46:13 AM »
78 shortbed.. will be going solid mounts.are the frames in these truck drilled for big block and small block?? do the mounts just get moved out a tiny bit to comensate for the big block added width or do they do it with mounts??

Offline Captkaos

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Re: small block to big block swap/whodunit?
« Reply #1 on: February 08, 2010, 03:43:49 PM »
there is only I6 and V8 locations.  SBC and BBC is the same.

Offline 07montecarlo

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Re: small block to big block swap/whodunit?
« Reply #2 on: February 08, 2010, 05:58:14 PM »
are you sure the bb isnt just a tad wider at the mounts??

Offline choptop

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Re: small block to big block swap/whodunit?
« Reply #3 on: February 08, 2010, 06:47:48 PM »
I swapped my 350 for a 454, no problems. I used the 454 mounts that were on the block already and just bolted them to the existing mounts on the frame. No problems at all. Problem I had was the donor truck was a 4x4 and mine was a 2wd, so the headers didnt fit from the 4x4. All of the accessories, hoses etc bolted right up. Swapped both engines from one truck to the other on a saturday. I used my original radiator because it was already a 4 core,and the donor truck was a 76 where mine was a 81. Ill never regret the swap. Before and after pics included. The after show a dirty engine, sorry.
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline Captkaos

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Re: small block to big block swap/whodunit?
« Reply #4 on: February 08, 2010, 09:11:32 PM »
are you sure the bb isnt just a tad wider at the mounts??
Yeah, I am 100% sure.  I have swapped a few of these out in the past 20+ years.

Offline 07montecarlo

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Re: small block to big block swap/whodunit?
« Reply #5 on: February 09, 2010, 02:56:28 PM »
are you sure the bb isnt just a tad wider at the mounts??
Yeah, I am 100% sure.  I have swapped a few of these out in the past 20+ years.

i trust you, just something from the past is running through my head that said they where like a 1/2" wider, but i think thats from a
78 t/a i did from pontiac 455 to bbc, it was off 1/2"....