Thanks for all the positive comments. The exhaust system is dual 2.5" with a pair of Flowtech Afterburner mufflers.
At first I was only going to do a small upgrade, but I wound up doing quite a bit including, upgrading to a Comp Cams custom ground cam, Pro Magnum 1.6 roller rockers, double springs, magnum pushrods, and hydraulic roller lifters. I also upgraded to a vented opti, replaced the timing set with a Cloyes double roller, and installed an electric water pump. I also got what Airflow Performance Engineering calls a Stage IIII Port job with 2.00 and 1.56 stainless steel valves.
The cam with the 1.6 roller rockers gives me a total lift of .580 and .587 with 112 lobe separation. I'm not quite sure which figures you generally use for duration, but the cam card states:
duration @.006 tappet lift 286 304
duration @ .050 236 242.
I'm now shoping for a laptop cable and someone to reprogram my PCM to make the best use of my upgrades. As of now I'm thinking of using PCMforless.