Since you are in Simi Valley, I would recommend Art Carr, California Performance Transmission. He has been one of the premier 200r4 specialists for over a decade. I recently visited Art and his shop in Hunrtington Beach and was thoroughly impressed, watched them run their transmissions on a dyno.... we have been using and selling Arts convertors for years, they are one of the best out there. If you have any questions, give me a call or PM... Most applications out there require no more than a $1000.00 to $1600.00 reuild...