If you want to get more power to the ground...not waste power, get a small diameter TC with little slip. Usually the smaller ones dont have lockup, but there are some that couple pretty close to 1:1. Its an expensive investment, but worth every penny. You'll be shocked at the massive improvement in acceleration. Couple that with an aluminum driveshaft, thats close to stock diameter, and you'll free up even more wasted power. I had an art carr 16930 non lockup, and when I switched to a stock D-5, it felt like it lost 100hp...I always say that every time I mention it, but its true. Get something of the same diameter (9.5"), but with lockup if you can afford it, and theres no reason you couldnt drop a second or close to a second of your ET over a D-5. Over inflate your front tires or get some skinnies, pull the front sway bar to get more lift on launch, do an ebrake/brake launch...you could drop 3-4 tenths off from that alone. You could probably cut 1.5 seconds off your ET without even touching the motor, between a small diameter TC with a flash stall about 200rpm above where your boost peaks, and those other things.
Anyone ever see any improvement from headlight covers? Those big headlight pockets seem like they'd cause alot of drag. 96-98 mustang owners typically see a 1-2mph gain by just removing the wing, so it seems possible.