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Old 08-10-2005, 08:58 AM
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'98 4.3L transplant to '87 Chevy Pick Up?

Hi All,

I have a chance to buy a 4.3L low mileage motor from a 98 chev pick up. It
is supposed to be rated at 200 HP and has CPI.

My '87 Chevy Pick Up has a 4.3L engine but it is TBI. I think in '87 the HP
was around 150. I would like a few more HP.

Rather than change the wiring harness and computer it has been suggested I
put my TBI system on the new engine in effect getting rid of the CPI. I
assumed Chevy got the extra HP on the 4.3L by using the CPI.

So... What would I gain in HP using the new engine with my old TBI? Would
the intake from my old 4.3L even fit on the '98 block/heads? How many
changes did this motor go through over the years? Opinions? Ideas?


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Old 08-10-2005, 09:02 AM
71 c-10's Avatar
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i can answer this, the intake will not fit! if memory servs me right... it wouldnt be that bad to switch all the harnes and all over. If you could possibly have both trucks for a lil while.
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