It takes about 13-15 HP to gain a tenth on a 3000lb car(at your present ET). You might try 1.6 rockers on the intake side and increase the compression to 11:1. A decent port job should gain 2 tenths. Don't forget the short-turn if you do anything more than unshroud valves.

Of course I'm just a keyboard racer, but I did stay at a Holliday Inn once