Biggest rim/tire under 67-69 vert

What size tires you guys got under your verts? Just bought 15x7 with 3.75 b.s. and was wanting a 235 60 15 or a 245 60 15 but car is in paint. Anyone have a similar set up?

You need to change that to 4.25" backspacing.

Is the rear low or high?

With a low rear on my 68 Dart conv, I was pretty maxed at 245/60/15 in 15x7 with 4.25 backspacing with small bolt pattern. I have orignal quarter panels on the car too.

Large bolt axle widen the rear 1/8" or so.