Has anyone changed their LT1 setup to the GM Performance LT4 Hot Cam Setup? Though the promos guarantee 425 crank HP,to insure I get there, I am also going with a bigger TB, 58mm vs the 52mm, 32 lb. injectors vs. 24 lb injectors, the Edelbrock LT4 Intake, Hooker Shorties, K&N air filter, .030...