400 can happen, but its not very streetable. 75mm TB kills low end torque, and 4.30 gears suck crap for the freeway.
Look how many guys are under 300rwhp HP on this board with aluminum heads.
Im going to put in a 351 soon, and I'm going with 11:1 compression, and I'm shooting for 410hp with my heads, a TFS351 intake and some sort of custom cam.
Skyler
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-1989 Saleen Mustang #406-
TFS Heads, E-303 Cam, Edelbrock Intake, and a whole lot more.
13.2@106mph
-Shooting for 12's and a 351 slowly in the works!
Stock-94 Integra 15.48@91mph