OK, here's a combo that keeps your 327 block.
.030" over for a classic 331cid. with flat top pistons with 5cc valve reliefs, Vortec heads, Performer RPM, Comp 268HE cam, a 600cfm carb with small tube headers. On DD2000 it makes "roughly" 374FWHP @ 5500 and 391FWTQ @ 4500. Good low end TQ and compression is 9.5 to 1, DCR about 7.6 so it should run on 89 Octane, 91 no sweat. In a light car with a 4 speed and 4.11's it would be an absolute blast and have a bit of a "racy" idle but decent manners.
You'll have to get a different intake but you won't have any trouble selling the ZZ4 intake.
Last edited by Hippie; 01-03-2010 at 06:02 PM.