Hey I bought a 90 LX Convertible 5.0 a few weeks ago. I'm trying to get some more power out of the thing and I'm doing so with an exhaust upgrade this weekend. Now my next question. It being an AOD it just seems to drag the car down. Are the shift kits really a good investment or not? I see three possibilities in Summit's catalog. The shift improver kit, transpak, and the transkit. Any help appreciated.