My brother is going to tear down his high mileage 4.3L for a rebuild
and we're looking for input on performance mods for it. It's an 89
Astro van with the the "Z" series 4.3 roller cam engine and TBI.
He's looking for a bit more towing grunt (some low rpm but mostly
between 2000 and 4000 rpm) and doesn't want to give up any ground
clearance, since we do a lot of near off road driving to get to
favorite fishing spots while towing a small boat trailer.
Edelkbrock says their Performer TBI intake will not fit, and Sanderson
says their headers are not for the vans either.
And is there any other choice for heads than the stockers with the
"ramp" in them? UT doesn't do emissions testing in our area any more so
it'll be duals, no cats and a different computer, if possible.
Replacing it with a V-8 is not an option, even if possible.