Turbo 400 vs. 700R4

[Jethro1]

I have an '84 K5 Blazer 4X4, the 700R4 has puked out all it's fluid at 20K miles on a rebuild. That's what it did prior to the rebuild (which was done at a GM dealer). I have a chance to buy a used '88 700R4 ('87 & later are better I'm told) or an '84 Turbo400 behind a 6.2L diesel 4X4 pickup. If both transmissions are in good shape, which would be better? The overdrive would be nice, but the Turbo400 would be stronger? Would the turbo 400 have problems fitting to my NP208 transfer case? Would the driveshaft lengths need to change for the turbo 400? The turbo 400 is a little more money. Thanks in advance for your suggestions.


__________________