fwiw, back in the day on my 71 Demon I ran a 28.x11.5 hoosier quick time pro (10" tread width) on a 8" weld draglite w 4.5 backspace. Springs in stock location and they fit, but not a ton of room..
That gives me hope that I can make them fit. The 11.5 QTP lists as a 11.2 section width.
see what wheel the specs were based on. a slightly narrower wheel may pull the sidewall in a bit, allowing you to use that tire.
This is exactly what I’m hoping, they call for a 7.5-9.5 rim width according to Summit. The 73 340 duster we built had Cooper cobra 275/60/15s on an 8” rim with 4.5 B.S and the belly of the tire was 1/4-3/8” from the springs . I’m looking at running stock steel 15x7 Fifth Ave/ Diplomat wheels that have about 4-4 1/4 B.S. if all else fails I’ll move the perches on the 8 3/4 and buy the offset shackle Kit.
