The tires above are 28x13.5.
Moving the tires back didn't make sense to me.

These are 30x13.5:

Walter
1969 Dart Swinger w/ARC Pump Gas 493 B1/BS 10.18 at 130mph
Racing Pro in street trim.
1981 Aries ARC 548 B1 8.88 at 147mph (footbraking)
1996 Ram 2500 V10 16.52 at 80mph
1981 Reliant 400