approximate tire heights -

225/70/15 ~27.44" and 255/70/15 ~29"

215/65/15 ~26.02" and 235/60/15 ~26.12"

225/60/15 ~25.63" and 255/60/15 ~27.05"

I've never used them but the Sportsmans in 235/60/15 (F60-15) front & 255/60/15 (H60-15) rear sound like a good combo.
I'd get confirmation on the fit of the 8" wheels, '67 wheelwells with the low opening are small.