318 Cam

If your car is 3200 and you are 165 for a total weight of 3365 lbs. the the 90 MPH speed only yeilds 201.9 HP. This is close to what I stated in the 3rd post. The gross at the flywheel then comes to 242 HP. Which is what you were looking for, and a 318 should already be at 9.0:1 for pistons.