'69 nova tire cleareance ?
you could fit a 275/60 but it will have a lot of tire buldge.my only concern would be if the would fit in the rear fender and the novas rear fenders kinda skinny and is the tire tucked in them?
I always wanted to run 15x8 rallys, but they had a 3.5" BS. This stuck them out 1/2" further than the 7" wheel. Major fender interference. A 4" BS would put them in the same location as the 7" wheels.
Now there are some rally wheel manufacturers that will make custom backspaces. A 275 w/ a 4.25 BS will likely hit the shock area of the fender well & require some modifications, but it will tuck them under the car. If I had to do it over, I would likely use a 4.25" BS & add a small spacer (1/8" to 1/4") if I had to. This wheel would let you use the 15x7 trim ring also.



