Thread: 91 k1500 4.3 to 5.7 motor swap?
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Old 05-04-2004, 10:42 AM
live_&_breath_cars live_&_breath_cars is offline
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Re: 91 k1500 4.3 to 5.7 motor swap?
Quote:
Originally Posted by Jeff7076
Can anyone help me with this project? I would like to know what I need to swap my 4.3 to a 5.7. The 4.3 has TBI with a 700R4 trans? The smog pump has been removed prior to my ownership. The big question is will I have to worry about the Transmission and the TBI if I get a small block with no intake? Can I use the existing TBI unit? I know I will have to change the fly wheel, motor mounts and Prom.
Any advice is greatly appreciated.

Thanks Jeff

forgot to mention u can't use the TBI off of the 4.3 because the fuel injectors have a different spec from one engine to the next.
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