As already mentioned yours will have a GM 10 bolt 8 lug front and a semi float 14bolt rear. A few things to consider are........ I would highly reccomend a transmission with an overdrive for any long distance travel. At the time your Sub was made gas was cheap and overdrive technology, while out there, wasn't exactly the norm. 3/4 ton Suburbans in that era were made for guys with heavy duty needs but wanted cargo room (general contractors, formans, etc.) and this was before the rage of bigger is better SUV soccer moms. All that being said, highway RPM's were not GM's big concern at the time. While I personally believe the GM 10 bolt front will suffice for typical expo duty, I am a firm believer of beefier is better and I would rather have a stout drivetrain as opposed to dealing with issues in the middle of nowhere. At bare minimum I would replace the semi float 14 bolt with a full float 14 as they are a dime a dozen (like $150) you will have to weld on new axle perches as the distance between the Suburbans rear springs is different then that of a 30 series truck. This in itself will solve multiple issues from heavier braking (cheap disc brake kits available) to the possibility of breaking an axle shaft. Remember these Suburbans are HEAVY as it is, let alone with all of your expo gear in it. As far as lift goes, I think 4" would be perfect. I would personally do the following.... 2.5" replacement springs up front with ORD greasable shackles (again solving the typical issue of the factory shackles rubbing the frame), combined would give you around 3.5" to 4" of lift and then do an ORD shackle flip in the rear which would net you 4". These Suburbans have a tendency of sagging slightly in the rear over the years and the extra 1/2" in the rear will be fine. As far as what someone said earlier, I would consider it mandatory to do the steering box/frame brace. If your not going with ungodly large tires (which I don't think you are) then just do the frame kit. Also, don't buy it from some specialty place, I love ORD and they are awesome guys with great products but you can get the el'chepo frame brace from 4 wheel parts for under $50 (cc100 is the part number). And as long as you can weld or know someone that can your in business. Now, if you can find a Dana 60 on the cheap then go for it, it is an easy swap and you will end up much better off in the long run. Again, go big or stay home..... I would rather be the guy helping someone fix their junk on an expo then be the one that requires the help, or worse then that be the guy stuck in no mans land in search of an axle shaft, u-joint, steering knuckle, etc. Do the above lift with some 35" BFG's or something similar and you've got a sweet expo rig thats simple to work on and does just about whatever you need it to on the cheap. If you need help on steering upgrades etc. etc. let me know.
p.s. a dana 60 will not effect ride quality... just saying.
