How to sqeeze out a little more speed?

Thanks for all the great info. I'm sure with a little "tweaking", I'll be able to get into the high 14s. I think I'll find a pair of 15" wheels and slicks then see about getting differant gears and carb.
Speaking of gears, since I have a "suregrip" rearend, will I have to jack up the entire rearend to do the gear count?