[Hexnut72]

What are you going to be using the car for? Are you going to race it or drive it on the street. Track days at a road course, drag strip, auto-x???

If you are mostly driving on the street I would get the big cubes and focus on a flat torque curve more than max hp at a higher RPM.

IMHO, a big cube engine with lots of power from down low is a lot more usable than a high winding engine with a "cammy" power curve. These cars are light and have short wheelbases... big power coming on like a light switch can be a little scary and not much fun especially if you have to spend any time in traffic.