big block motor swap
#1
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Join Date: Mar 2009
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big block motor swap
I have a 67 chevy impala convertible with a 350 sb that was put in place of a 327. So the Impala was originally a sb 327 car. I am new to the muscle car world. I am looking at a gm perf. parts 454 to put in the Impala. I know I will have to buy new motor mounts and bb headers. Is there any major concerns I should be aware of or will it be a pretty easy swap. Any suggestions or transmissions. I would like to get a transmission with overdrive but was told a TH 400 is more affordable. Will I have to move the transmission mount and if so is there different mounting spots on this particular car?? Any suggestions with my questions or an ideas would be greatly appreciated. I am nervous and somewhat fearful I may be getting in over my head. Due have numerous friends with more experience than me that are willing to help. Nervous in OHIO.[/b]
#3
It wont be any real problems. I did basically the same swap 30+ years ago in a "66 Impala. Like you said different motor mounts and i think the frame has multiple holes for putting the cross member where you need it. I would put the turbo 400 in and hope its got rear gears in the 3.23:1 range and let the torque of the big block work for you.
#4
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Join Date: Dec 2004
Location: out of my mind in Kalamazoo, MI
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Re: big block motor swap
Originally Posted by jason26933
I have a 67 chevy impala convertible with a 350 sb that was put in place of a 327. So the Impala was originally a sb 327 car. I am new to the muscle car world. I am looking at a gm perf. parts 454 to put in the Impala. I know I will have to buy new motor mounts and bb headers. Is there any major concerns I should be aware of or will it be a pretty easy swap. Any suggestions or transmissions. I would like to get a transmission with overdrive but was told a TH 400 is more affordable. Will I have to move the transmission mount and if so is there different mounting spots on this particular car?? Any suggestions with my questions or an ideas would be greatly appreciated. I am nervous and somewhat fearful I may be getting in over my head. Due have numerous friends with more experience than me that are willing to help. Nervous in OHIO.[/b]
#5
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Join Date: Feb 2004
Location: IN
Posts: 176
I did this swap on my S-10! If it works there you should have no problem on yours. I didn't have to swap anything as all mounts went back where they were. The only major change you will see is that the BBC will extend forward (toward radiator) @ 4-4 1/2 inches closer than a SBC. Good luck. Dave