Did you happen to notice the rpm at the finish line?
4.10’s and what diameter rear tires?

I don’t think 13.06 is what you’re looking for...... but I’m sure there was some sort of expectation when you were putting it together.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads