Looking to get a little more top end speed from my rx-7. I run out of gear in the 1/4 mile with my 3 speed auto. Currently running a 26" tall 9" wide slick. was looking into a 235 70 15 (27.95 tall by 9 wide.) or maybe even a 255 60 15 (28 tall by 9.5 wide) tires. Wondering which will fit better... if at all.

Thanks