Quote Originally Posted by mprevo View Post
Why do you say it won't work? I always say that I'm never to old something new from the experts, so I would be intested in your thoughts.
Tech can likely say it better, but your rear tire circumference, rear gear ratio and desired highway cruise speed will define a narrow band of rpm that you'll be looking for good economy and enough torque to keep from having to "get into it" for minor changes, like rolling hills, passing, etc. Your cam will have an rpm range for best power and economy, and a torque curve that tells you the flexibility of the engine speed. An "aggressive" cam is generally "happy" 3500rpm and up, while your OD tranny is going to be cruising at a much lower rpm which can make for a very frustrating hot rod. Your cam is probably the most important decision you'll make for a happy driving experience, followed closely by the balance of tire size (for looks and operation), rear gears and tranny OD ratio. Just my $0.02.