Quote:

X heads may be a tad better than a J head


Not on the dyno testing I've done, with the same flow numbers on both The X have the valve eyebrow protrusion issues that need to be resolve on a blueprinted all out stocker motor, the J heads don't Or maybe I have it backwards It's been close to 20 yrs since I've touched a competetive SB MOpar stocker motor


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)