without spending huge $$$'s on heads i would have to say the ls3 heads ported would be your best route. and a FAST 102 intake and 102 BIG MOUTH tb would help in a huge way, you can conserve on the heads since the ls3's flow numbers are sweet.. then surround that with a nice custom cam, it'll take the whole drivetrain to complete the whole setup though..
i have seen the l76 intake being ported flow some great numbers also
i spent the dollars around my heads which are the ls3's with leight weight valvesto make my setup work..i've got every bolt on imagineable and some
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