denko, another option would be a built 200R4....aka 2004R. It will require less work than the 700R4 as the driveshaft won't need to be shortened if replacing a TH350 or ST300 and the yoke stays the same.....plus with the 200R4 you won't need an adapter plate to bolt the Chevy trans to a BOP block.
It really depends on what you want to do. I am still up in the air on which trans I want to switch to. I'm swapping out a TH400 and have a custom driveshaft so it may work better to use the 700 instead of the 200R4. I'm in no rush though.....want to see what kind of times I can pull with the Th400 before switching to an OD.
