Dump the 3.73's and go to 4.10's. Stick some shortie headers on it, X-pipe, exhaust, pullies and a PI intake/cam swap. Should get you into the low 13's. If you want more check out Modularheadshop - MHS for some goodies. Nick McKinney and crew have spent some good time getting the modular heads down pat and I'd recommend them to anyone. Been eyeing a set of heads for my Vic now that it's paid for, lol.. I'm sure the wife wouldn't mind