I got rid of the cushion plate in high drum and used 5 clutches. Should I reuse the rest of the c5. I never heard for sure if anyone has ever used the complete c5 or just parts. Is the pump interchangable with a c4. The c5 has a rusted pump and i was going to take out the check ball in the c4 pump. I have a manual valvebody with brake so i hope the oil passage are compatible.