Kristian
Its all about what you use the rig for man.
I retrofitted elockers into my 80 here: (front writeup coming soon)
http://www.yankeetoys.org/mangler/elockerinstall.htm
I have retrofitted and fabbed in 2 elockers into non-elocker housings. Its a pain, but doable. The front locker mechanism is completely different then the rear, so getting a custom or non us shaft isnt an issue in the front, you can use the non locker shaft with the locker, etc.... The issue with this is the limited gasket surface and potential for leaks if not done 100% perfectly!
I suggest just waiting and finding the proper housing and buying a complete locked front end if you must get a locker.
Again, it all depends what you use your rig for.
Me, i use my rig for everything from fire roads to somewhat gnarly trails.
With a decent suspension and some nice aired down tires, there is almost zero need for a front locker on an 80! That is my opinion of course. I have put my rig through some gnarly stuff and have only engaged my front locker once or twice and that was just to see if it worked. Personally, i prefer to push my rig and my driving skills to the limit in stock form and see what it/I can do instead of push a button and point and shoot!
If your plan is just to wheel the rig and do moderate stuff, the front elocker isnt needed. If you plan on more serious stuff, it might be a good idea. But if you are wheeling serious stuff and need a front locker, you will probably want stronger axle shafts, etc..... The front locker does put a ton of stress on the related parts.
I didnt answer your question really, but what i am trying to say is that if you find a good deal on a NON Locker front end, i wouldnt hesitate jumping on it.
Also, check with the brake compatibility. I think the 93+ front ends use differnt calipers and ABS and such, make sure that all meshes with the older stuff.
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ROFSheriffHL: