tom, we built the motor to run purestock drags in Stanton, Michigan yearly race..but, didn't quite make it..alot of little things make a difference..it runs good behind the Muncie and 4 ;10 gear..

I'm surprised at how rich the 2nd L72 is running compared to the first.

There is more HP left on the table. Holley new replacement carb 4346, org 4346 carb not restored yet, no need to tune or beat up org engine with wrong carb. I would think if the AF/R was in 13.4 range it would pick up 20+ HP