Took it to the track today, only did 1 run and it did 12.79 @106mph and a 1.78 60 ft, pretty happy with that

this car has never been in the 12's
Eheads and roller cam are great, tons of work but worth it! Drove it @50 miles each way to Island Dragway and it was great.
Ended up with 74s/94s but cruise is still rich, it's at 11.xx AFR at 3K rpm at 65mph, going to try 70s in the front at some point. Idle is fine @12-13 and full throttle is fine, in the 12's.
What's strange is a few times, I got into and when I got off, it leaned out- usually gets rich, why would it lean out right after I let off from flooring it?
Thx!