Re: 68 Wheel rub
If you go to this web site WWW1010tires.com they have a tire size calculator you can use . It says a 235/60/R15 tire is 26.10" in dia. and a 215/70/R15 tire is 26.85" in dia. so it seems you put a larger tire on when you went to the 70 series tire , that may be why it still rubs . If you went to a 215/60/R15 tire it's 25.15" in dia. which would give you a inch less in dia. I have the same problem on my 68 with 245/60/R15's and I think 215's will fix it on mine.
68 work in progress , but I can drive it now - O5D build - 712 trim - 02 color
Think it was a 396 , 4 spd. - now in primer , 350 , 4 spd. , lots of new body and mech. parts