Go w/ 4.10's. I started w/ 3.73's, and upgraded. I actually have some 4.30's on the way now
Also, cams would help, especially a custom grind.
Pulleys may help, as well as better air flow in and out (intake and exhaust)......
Then go w/ a custom chip....
But a lower ring and pinion is your best bet. 4.10's would make you smile
-Will