I drive the 90 mile run to Carlise at 60 mph in my 63 with 4.30's. I use a 30" tall tire and it runs about 3200 at 60 mph. Its no problem for me to run the 90 miles at 3200 rpm as it usually takes me about an hr and a half. Ron

Last edited by 383man; 03/07/15 12:22 AM.