Tire size question

I had a 68 dart that I put 325s on. The rear was narrowed 3 in. from each side, fully mini tubbed, springs moved in & there was plenty of room on both sides. The rear in the barracuda I have now was narrowed 1.5 in. from each side. When I had that dart I got better traction on the street than I did on the track. My barracuda is a 383 4spd car. I am going to run 3:55 gears. It will be a street / strip car mostly street. I figured out the tire / wheel size on that dart the same way you did. I think A bodies look awesome with 325s