Ok my friend had a 66 comet. it has a 289 auto in it. he is thinking about putting a 390 in it and wants to go 4 spd. he asked me if it is possible to put a chevy m-20 or m-22 in it. he wanted to know what tranny's old classic fords like this came with. (which 4spd tranny's) i told him i was not sure and would ask so please give me a little help guys.