5.7 lm7 rx7 or rx6.0l
 

ok so basically i have my car ready to recieve engine, and my trans bought th400. I just cant decide what engine, im looking for 400-450 whp na plus spray.

I can get a lm7 that needs rebuilt for free, or a high mileage running LQ4 for 600 bucks. Basically which one will be cheaper to build for my hp goal, im on a budget (daughter on the way budget).. also might want to make slightly more power later (this is in a 2300lb car so prolly never anymore then around 550 whp)