AEM? No. Google LS1-edit. Anything is possible. But you'd need to fab engine and tranny mounts of course and modify your driveshaft. It's going to cost a LOT of money if you are paying someone to do it, which it sounds like you would be.

400-450? You can make that with cams and bolt ons to the wheels with an LS1. With an SC you should make 600+ easy. Unfortunately what you listed is about 15k-20k