I've been doing research on my 47 fleetline trying to figure out how to make it a open drive and keep the three on the tree. I was told the 60's saginaw would work? Is that the only trans that will work? I have a pile of chevy 3 speeds I think there muncie 55to59 not sure my dad ran them back in the day. Im just looking to get up to speed on the freeway. I still have the 216 in it. Will the cross member work with the newer 3 speed? Also whats a good rear end with 6 bolt pattern. Trying to figure out my options so I can start collecting parts this summer and plan probably. Any help would be great.