punching the 3.4 to a 4.0

[1988GTU]

If you choose to go with something light, the llr 3.7 might be something to consider. Otherwise the lx9 with mods would be my primary option if applicable... pending if you can hide it as a 3.4/2.8

[milestonemotorsports]

Thanks for all the imput , I guess what i'm shooting for is trying to get close to 300hp out of a 3.4 , and still use 92 octane , and run for hours across the desert in the summer

[Superdave]

If you can weld aluminum, you could probably cut a hole in the top of a 3x00 upper intake, and weld on a carb spacer as your base. You could chop off the throttle body neck and weld it shut, or just install a block-off plate.

Might be easier than building an intake manifold from scratch.

Just an idea...

Equinox plenum


Bszopi is right though, use the aluminum heads and make a carb style lower intake. You want as straight of a runner as possible with a carb.

Something like this should work, using a Gen 3 lower instead of course...

http://www.3500z.com/60degree/60V6%20Misc/Gen2Carbintake.JPG

[torq455]

What's the rpm range you run in?

[milestonemotorsports]

we are usaly running between 5 to 6 thousand