[2blu442]

I've not done the swap, but have been told the 200-4r length is the same as a TH350 so you can use that driveline to get the correct length. I know that 1968-72 Cutlass'es used the same crossmember for the TH350 and TH400's, they just bolt to different locations on the frame side rails. So I would suspect the full sized did the same but am not sure of that. I've got a 1968 Delta Custom that I'm parting out, and it looks like a larger rear end than the Cutlass/442 units. It has a 455/TH400 in it. I also have a 12 bolt posi unit I was told came out of a 1968 Olds 98, casting number 700, so I had thought the full sized of this vintage used a larger 12 bolt rear end. I know of an aftermarket company that makes the shifter detent for the 4 speed automatic for a floor shift. If your going to keep the column shifter I believe you'll have to change the column to a newer one made for the 4 speed automatic. Sounds like a cool project, but just some thoughts to consider. John