[TCR_BRIAN]

I've heard that Scat, Eagle, etc... have their cranks made offshore to their specs and then they are shipped here where the all final machining is done.....Hyper pistons work good in a N/A motor as they are usually lighter than a forged piston, less reciprocating mass....good for mild N20 usage 150 hp or less, but no where near as strong as a Forged piston....Hyper has all the benefits that PSB has listed....detonation kills, whether with a power adder or not....I would stick with forged having used both hyper and forged before, and a good quality one at that, such as JE/SRP or Diamond etc...and tell them what you are using them for...N/A (Lightweight), N20 Drop the Rings, ports etc....Stroking will shift your Powerband/ change compression/ etc etc.... make sure to spend the money where it really counts...HEADS!!!! 400 Hp out of a 347 is easy though....You could get it out of a 306, 302, 289 but like I said it will be higher in the RPM, thats all......so as example the 347 will make 400 @ 6000 lets say and the 306 @7000.....something like that........