I think people are confusing the “ running them without tubes “ and they leak.
Everybody seems to know how to make the tires hold air without tubes.......
My point wasnt about holding air, my point was i run tubes on QTP’s only because it stiffens the sidewall. I have run them with and without tubes, prefer tubes, stiffer sidewall

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