I may have a line on a 4runner rear axle with the e-locker, but I'm curious if the width, gearing, or 3rd member size plays a role in it being a doable swap. If I went this route, it'd probably be going on an early (80-84) toyota pickup with leaves etc. Also, is there a writeup anywhere on it?

 

Dude - search.

You don't have to swap the whole axle, the elocker third member will fit in your housing with minor modifications.

 

how does telling him to search solve the problem, maybe he already did? http://www.4x4wire.com/toyota/tech/electric_locker/
Not sure if thats what your looking for but should be a start

 

This wasn't in "Newbie" when I told him that.

Thanks for posting the link. Also this one for general Toyota diff info:
http://home.4x4wire.com/erik/diffs/

 

Because TC is teaching the guy to fish instead of just giving him the fish. If he had searched, there would be no need for this thread because he would have already found the answer. Since this has been moved to newbie, it is now frowned upon to tell the guy to search.

With that in mind, 914x4runner, anything is possible with a welder and grinder. It all depends on how much work you want to do. Keep in mind that a 4runner has links and coils so you'd have to weld on you own spring perches. The axle is also slightly wider than an early 80's truck. You're gearing will have to match the front axle.