Post your wheel and tire combos.
This is my 73 Duster with a comparison between 14" and 15" wheels. The top pic is 225-60-14 front and 235-60-14 rear, the bottom is my new setup, 215-65-15 front and 255-60-15 rear. The front wheels are 14X7 and the bottom setup is 15X7 front and 15X8 rear.