I've doubled up the main leaf in 2 MJs so far and I like it. :thumbsup: Unfortunately I've got no measurements that could directly compare before and after heights or spring rates. :dunno:
non-metric ton MJs have three main leafs and one thick overload. How many leafs do you have? You should get an inch from adding in another main leaf under your current one. As an added benefit it'll help combat springwrap. I'm guessign that an S-10 or Explorer main leaf would accomplish the same. But without a pic of your leafs, it's hard to say.
Not sure where he's from, but I've yet to own an MJ up here in Michigan that had a bumper I would trust the for anything. Rust will eat them from the inside out (and they are just sheetmetal after all). :(
I used bailing wire to just strap the arm to itself. The important thing (assuming your valve still functions) is to have the arm about parallel with the ground.
Oh, and Explorer leafpacks can also work. They sit a bit lower than even 2wd MJ packs. But you must reuse your MJ main leaf and re-drill it to accept the slightly larger Explorer center bolt.
4wd MJ on the left, 2wd in the middle and Explorer on the right:
Not that I know of. By this point in time, the condition of the leafs matters a lot. I swapped out my old rusty 2wd leafs for a rust-free pair from FL and got an inch of lift. :dunno:
While we're on the subject, to help battle the springwrap I added a second MJ main leaf to my packs by cutting off the eyes and placing it directly below the main in the new pack.
I believe I saw it on "Extreme 4x4" the tv show. Essentially, you pull out the 3rd member, gut the housing, pull off the knuckles, flip the housing to become a drivers side drop, then reassemble. If you say it fast enough, it almost sounds easy. :D
Checked the engine block ground? Just a thought.
I also had a super rich condition in my 86 (carbed, so I don't know if it really correlates) due to a weak connection at the coil (the wire that feeds 12volts to the coil). The weak spark wasn't burnign all the fuel in every cylinder. Eventually I blew up my muffler while trying to diagnose it. :D