1971 Demon 17" Help

Yeah those appear to be the Year One 17x8's with a 4.5" backspace. They work fine in the back if you're running an A-body 8 3/4 with BBP axles, but in the front the 17x8 with a 4.5" backspace really doesn't have enough backspace. In order to put any decent sized tire on a 17x8 in the front you really need at least 5" of backspace, and really more like 5.25" to 5.6" is ideal.

Just for comparisons sake, a 17x8 with a 4.5" backspace and a 225/50/17 on it (narrowest tire recommended for a 17x8") your tires would stick out further than the 275/35/18's I run on 18x9's on my Duster. Can they work? Yeah, if you run your ride height high enough they probably won't rub. But if you lower the car from stock at all they'll interfere with street driving. Technically a 215/50/17 would put the tire in the same spot as my 275's, but the widest rim recommended for that tire is a 17x7.5", and those Year One rallies only come in 17x8 or 17x9.