I am not sure on the horsepower I want as much as I can get on a budget. See my biggest issue besides money is I have never raced or built a motor so I dont know what horsepower does what. I just know bigger is better. It is for on road use street/strip. Its going in a 4200 lb pick up. Not sure about rear gears and thinking about a turbo 400 or 700 R4. Keep the info comin I appreciate every bit of it.