If you wanted to go all out, D&D has there 2.95 super alloy gearset for $450, then you need a rebuild kit..... course then arent far from a tremec or a T5z.

Btw you have a WC in your car already, dont buy into all that stuff you see on ebay parts about WC stuff into yours, you already have it. Only upgrades is stuff like the t5z has....