[KingLT1]

These cars make 700whp on 9-10 psi with a cam. You can't compare old school methodology with these DI engines. They allow higher compression then port injection stuff from the past. The octane wall for the LT1 @ 11.5:1 on 93 octane is around 700whp. The LT4's can get away with upwards of 800whp on 93 because they are a point lower.

That being said the 3.25 pulley will probably get you there. I would still probably run some meth so you can run more timing. I like the idea of building a powerful and efficient engine NA then adding the least amount of boost required to reach the goal.