What Mod should I do next

First of all, beautiful car! I love the black hood and the tinted windows. really good look. The rims aren't my style, but do set off the car nicely. I bet the black Bullits would look good, too..... Anyway....

Is that hood scoop functional? Have you thought about a new air intake and a tune? That would maximize your new dual exhaust set up. Also, the V6 has no limited slip differential. A Ford TLOK or a Detroit True Trac would help you out there. Going with the True Trac, myself. No wearable parts and has posi even while taking curves. The V6 Tech section is a great place to look and wiser heads than mine can steer you in the right direction. Good Luck, and once again, beautiful ride!