Ok, the car is a 70 challenger with fast ratio steering, so not sure if headers will fit or not. The car is a standard. Rear gears are 3.55
The reason I said 400hp is just to clarify that I'm not looking for a stroker motor, just a point of reference. Mild build. Since the motor is in great shape, I was hopeing to get better response.
Are the 906 heads a good option for this motor or would bolting on different heads make a big difference?