1/4 mile times

You've got some very good mph's. See your 60' times are about the same before mods. With the 2800 stall and probably bringing your powerband up in rpm's a little after the head swap you might be right about needing a 4.11. Went from a 3.91 to a 3.55 in my cuda for better drivability & she started stumbling out of hole. Put in rhodes lifters to drop my powerband a little & it solved prob.

Oldschoolcuda