I'm at the same point you are! A little leak + 2-3 Flare when shifting. I joined the FordMuscle C-4 section and they convinced me that I can rebuild it myself. I ordered the step-by-step DVD from Bad Shoe Prodictions, got me a Borg-Warner seal kit, bought me a rebuilt dead-stock torque converter from NAPA, and am getting ready to get started. The procedure in the DVD looks SUPER SIMPLE. If I don't have any defective parts, the rebuild should cost me less than $200. I do plan to put a filter in the return cooler line until the 1st fluid change to avoid contaminating my new torque converter and newly refurbed tranny.