well...I bought a mp590 cam 3 years ago....new with lifters paid 125 dollars...ran a best of 10.78 in 71 Duster 360 in vegas....thought hell that is an old and outdated cam...I should update to something new....bought a Hughes 6064 cam....paid 165 dollars plus had to buy a set of lifters too......71 Duster has run a best of 10.82 in Vegas....Wow...that old outdate cam can still get it done...If you got one use it...if you find one for a deal ...buy it..