700R4 to NP205 Question?

[72longbed]

I know this has been discussed on here a lot, but I can't seem to find the answer to this question: I need to know what output shaft length to use when adapting my 2WD 700R4 to my NP205? I'll be using an NP205 that was mated to a TH350 tranny, and it still has the TH350 adapter bolted to it. I'll also be using the 'spacer/adapter' from 'Red's somebody'?, that goes between the tranny and the TH350 adapter. I'm not going to use the Advance Adapters shaft, I'm using a stock GM shaft and need to know which one to use.
Do I buy the GM 13 1/4" output shaft or something else?? Oh yea, how many splines do I need on the output shaft to work with that 'Red's spacer??

Thanks a lot,
72longbed

[72longbed]

I looked in the FAQ's and can't find anything about 700R4's in there.

Can anybody help locate all those old Threads about 700R4's and 4x4's?

Thanks,
72longbed

[K5KRAZIE]

OK, I'm not sure on this spacer but I'm assuming it just bolts between the adapter and the trans. I used the A/A shaft when I did mine as I was not aware of the spacers. Spline count and tail shaft pattern are the same as the TH350, overall length is about the same as a TH400. The shaft I think your looking for is for a 4wd unit, although I'm unsure on the 2wd shafts length. I think theres a spedo drive on the 2wd shaft but am not even sure of that. I just used a K case out of a 91-92 4wd truck, used the case and the pump and everything else was modified or replaced. Including the output shaft.

[86k10]

I done this swap on an old 1 ton from a manual 4 speed. It's been about 10 years ago but I do remember we used an aluminum spacer block I found on an old 350. I'm thinking it was about 2 1/2 ' wide and don't remember a brand name on it. But just used the factory GM 4x4 shaft and cut it off about an inch on the chop saw and it is still working today.