May pick up a 69 custom coupe + I have a new a pr of 10-28-15 (L6015) Mickey Thompson Sportsmans will they fit inder a 69 custom Coupe on 15x8" rally wheels w 4.5" BS or 15x10 rally wheels w 5" BS w no tubs, severe hi jacking or other nonsense? If not, I'll probably use the new 235 60 15 Kumho's I have on 15x7 rallys all the way around.

L-60's should fit fine. They were a common choice of tire size back in the day.

Big Dave