Need clutch suggestions- 340/4-speed, Street/Strip

There was a tech article in Mopar Muscle Magazine a while back with mods for the push rod on the clutch pedal under the dash for A-bodies. It is supposed to help with shifting at higher rpms. If I can find it I will post a link. I did the mods to my Duster and it seemed to help the shifting. I have a Centerforce dual friction clutch behind a 360 and love it. I beat my car hard (reverse to second) and so far it has held up and never slipped. A buddy of mine has the same clutch in his 68 GTX behind a built 440 and he drives it like I drive my Duster without any issues also.