I agree with everything you say Mr. Yount, there are substitutes for cubic inches yes, but if you use the same substitute with more cubic inches, it proves the theory. Both theory's cubic inches and dollars. I guess my point is, if your into small cubes, you will have to spend way more to produce the same power as a large cubed engine. And to add to it, how long will the drivline hold up on a 4 cyl car if you get 350 to the wheels, seeing that you doubled the stock output of the engine. My buddy's lasted for 3 passes before he grenaded the diff. But the Mustang is still getting whooped on day in and day out with stock driveline.