27" tall tire. I had 28 11.50 15s on my 65 with 4.30s. At 55 it was about 2850 give or take. Necer bothered me and I drove partial interstate both ways back and forth to work almost four years. As long as you don't mind limiting your speed "most of the time" it's really not bad at all. BUT don't just jump to 4.10s. As long as you build the car TO the 3.73s it will probably be just as fun and not be wound out as much.
