Most of our Mopars members over cam their small blocks. Matts 1970 duster runs 10.50's with a 520 solid Racer Brown cam at over 3000 pounds.
ST-21 cam? 254* @ .050??
My Demon went 10.40s with a st-21 w/1.6 RAR in a KB190 piston 360/371 w/ ported 587 production heads and Victor intake at 3100#. Idled in gear at 800RPM. It sounded like a stock engine with open headers at the race track, but ran like a scalded dog. I sold engine to a buddy which put in a street Duster w/ Air Gap intake, less converter and gear, 3.73s, which has only ran 12.70s on BFG radial TAs, smoking the tires but reaching 109mph. Next trip to track will have drag radials and should run low low 12s or high 11s. Very drivable go anywhere anytime , let your wife, mom, grandma, anyone drive it!
