Helping a friend replace his tranny. His 4x2 has a 302 with auto od.

he has very limited funds and just wants to get going. Not worried about od, this is a real beater truck

did any of the mid 80s have a c-4? What would be needed to convert it to c-4 from aod as aod is not found locally. Add vac. line for modulator, what else?

Thanks,