I disagree that 1.38 equates to 10.20.. .... Way to many variables involved to make that statement.
My old car(3350 race weight) most often went 1.36-38 60 foots on 9 sec passes.
As another example I know 340 Ricks gen3 Challenger goes mid/ high 1.3xx while running 9.60's.
Compression, suspension, weight, and other factors contribute as well.
At 3375 pounds, that 1.38 would absolutely not hinder a much better time slip.



69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17