1998 l31: 383 (5.7 rods) large port vortex heads ported. headers and stock manifold with up-sized injectors. 255 in the tank and 411 pcm swap with 24x crank sensor and ls1 over valve cover coils. and a k&n cai. long tubes, 3" dual inlet 4" outlet spintech. proper cam and good tight quench.think 450/475 can be made at the crankshaft? also i realize 4l80 swap will be coming soon just wanted to throw it out there before i lean in this direction. heads will probably be purchased bare ported and fill with ferrera valves and such other like parts.
wondering what the bench racers think out there?