My wife and I recently bought a 1964 Chevy panel truck. The previous owner had installed the engine and transmission from a 1990 Chevy Caprice. He had figured out how to make the manual shifter on the steering column work to shift the automatic transmission. Its a bit awkward because if you shift it incorrectly it locks up. The truck runs and has the original drive train. We would like to upgrade the drive train to be able drive it regularly so we're not looking to make it show quality. I'm not sure the best way to get started. I do know it would be nice to be able to shift the transmission without having to worry about it locking up. Eventually we would like to get rid of the carbureted engine. I have been told that the drive train from a 1988 pickup would bolt into our frame. I am looking for any advice on the best way to proceed.