Well, I am torn between keeping it lower to get longevity versus more performance. The Hughes hyd. roller cam's range is listed at 2800-6800. The Eddy heads were modified, including installing Hughes double valve springs to handle the high cylinder pressures (over 200). The rest of the valvetrain is stout, Manley pushrods with Comp ProMagnum roller rockers, so I guess I could go to 6500 safely when racing. Thanks for the help. -- [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. This email was sent to: arc.6265@xxxxxxxxxxxxxx . http://www/?p=