Not trying to be negative , but what's the big deal about holding in a button on your wheel when backing up. Your hand( hands are on the wheel anyhow) guess I don't understand the issue.

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, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8