This is a little out of my element, hence why I am asking the question. In a FSJ behind a 700r4 (Passenger side drop) with a Mild SBC or LSX is there a viable strength benefit with the New Process cases over the Q/T? I like the idea of a part time kit, mostly to run a locker in the rear (No weather here in Southern California). The NP205 is obviously a beast but kind of a pain to find and put behind a 700r4. I do not know too much about the NP203, is it all the problems of the NP205 with out all of the benefits (Gear instead of chain)? I have the feeling that 'If your gonna hang an old cast iron Trans Case off the back of a 700r4, make it a NP205' kind of thing. The NP208 and NP241c's are very comparable, except the np241c is slightly improved and has a slip yoke eliminator aftermarket support system. The NP208's are very common and I have yet to find a driver side mechanical speedo NP241c. Is it possible to convert an electronic np241c to mechanical?
So, I am left with a few viable options:
1.) 27 spline 6 bolt circular (TH350 1986+ Chevy trucks) Not common.
-I do have a line on a good 8 bolt 32 spline np205 for a good price, but I for see this being a slippery expensive slope
2.) 27 spline 6 bolt NP208 (Most common, direct bolt up to 700r4, correct me if I am wrong)
3). NP241c Same as option 2, if found for good price trumps NP208
4.) Along with the '75 Wagoneer I am picking up, it comes with a 700r4 set up for a Quadratrac! This makes for a very nice quick and easy swap. I'll probably swap this in ASAP and run it for a while. I know there is quite a heated debate over part time converting Quadratracs, for me, a part time case is more desirable.
Leaving the NP205 out of the mix, and agreeing the NP208 and NP241c are very similar in strength, how would a NP208 compare to a Part time converted Quadratrac in strength, longevity, exc? I would imagine the chain in the NP's would last much longer than the Q/T, since even in 2wd the Q/T is still using the chain.
Price wise I figure any option (Other than just sticking with the stock Q/T) would be comparable. ~$650 for part time with hubs and new chain
The transfer cases I can grab for ~$150 complete. Plus costs to rebuild and new tail shaft in the 700r4.
What are your thoughts on this? This is mostly future planning, its helping me formulate a budget for the transfer case and a plan of attack.
As a wild card do any of the New Process transfer cases make a particularly easier conversion to a 4l80e? (Never know if one of those were to fall out of the sky).
An adapter to mount a 32 spline 8 bolt 'racetrack' np205 to a 700r4, pricey but having the ability to upgrade to a 4l80e later is nice (Changes 700r4 output shaft to 32 spline.)