200R4 will also work. It is 4spd, overdrive and the same length as the 350TH. The 700R4 would require a new drive shaft. It was used in Chevy's '84-'90 in various Monte carlos, Malibu and Impalas. Olds used them the same years in 88, 98, and Cutlass, but you have to find one that has the universal Chevy and BOP bellhousing bolt pattern. I'm told the '84-'85 had issues, but were much improved by '89-'90.
