You'll need a new computer, one from a 96' 4.3 CPI with stick; a computer
from a vehicle with auto trans won't work. That, along with the wire
harness, and welding 02 bungs on the post cat pipe. Oh, and the EVAP
emissions have a few extra wires here and there. Hell, just use the long
block from the newer motor and buy a TBI intake that will fit the Vortec
heads. It'll be cheaper by several hundred bucks as wiring harnesses are
big $$ and all the extra wiring you'll have to run will take forever.
I agree with the Doc:
Also, while you put on the newer manifold. Put in a throttle body spacer for
a marked performance improvement.
The rewiring, if you are in the technical league to do it. (No disrespect
intended) would take many, many hours. Then the diagnostics to see why
something doesn't work would have you babbling and beating your head against
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