[dlampe]

I think it is a stretch to assume they sell there cars as a result of the engine build. It is more likely the rough ride, leaky roof, cramped quarters, loud pipes, or a number of any other reasons. The 302 is going to be much lighter. The 351 does have more cubes. Here is what it comes down to with HP, Your enigine is an air pump. Bigger cubes will move more air at lower RPM's. But it has little to do with the HP of the engine, just where the HP is. If you have small pipes or the wrong carb your air flow will get screwed up regardless of the cubes. Smaller engines need to rotate faster to to move the same amount of air. That means it will find its power later in the curve. Your speed on a road course is not going to be determined primarily by your engine. Instead by your chassis set up and the size of your stones!

Most of use are guilty of focusing to much on the engine. Build what you have. You will still have more car than you need, but it will always be less than you think you want!