Gen IV LS3 build elements

[PTAddict]

All an LS3 needs to make that kind of crank HP is a cam (and a mild cam at that). I had an LS3 in my previous car (71 Camaro), completely stock internally other than a 227/235 113 LSA Comp LSr cam. Headers too, of course. It made ~465 HP and 430 TQ at the rear wheels. It survived about 20 track days without a hiccup. It idled and drove almost like a stock late model Vette.