hey guys im building a 69 gto and i want to put in a ls motor and im trying to get over 600 hp to the wheels alot of people our saying ls9 has 630 to the flywheels but only 430 to the wheels what would you guys do im thinking a ls3 twin turbo ls7 regualr or turbo or supercharger and then the factory charged motors lsa and ls9 im not sure what to do im not familer with these what would you guys do ls3, ls7, lsa, or ls9 thanks

 

An ls3 can get you there na or turbo/supercharger. Ls9 is very expensive, along with lsa motors. Ls7 is nice, but for cost vs power ls3 stroker

 

All motor? Forced induction? N2o?

I would say just do decent 370ci forged motor with a blower. Easy 650-700rwhp.

 

630 to fly 430 to wheels?? That a major power loat

 

LS9s in zr1s dyno 540-550rwhp.

 

Ls9's are forged 6.2 with a 2300 blower cost $$$$
LSA's are not forged with a 1800? Size blower still $$$ but not as much.
Ls7's have thin bore liners and get heat soaked BAD, and are bad for FI. and blocks are expensive too
Ls3's are a good all around block and you can stroke it and get a special piston for FI if need be.

If it was me I'd get an Ls2 block and have ERL resleave it into whatever size u want and be done with it.