Ok, so i'm plannin ahead before i go all out and buy a crate motor. I plan on ordering a ZZ 383 with 425 hp and i have a feeling im going to need to upgrade the rear suspension to compensate for all the extra hp. Does anyone know what i need to be upgrading, (im guessing the rear control arms for sure). Also, i have heard a lot of arguments over choosing between a th350 or th400 turbo tranny... any opinions?