With yours being coil-spring, it does limit your options on front axles. The HP dana 44 will hold up pretty good as long as you're not trying to rock-crawl it. You are pushing the limits with the weight of the bus and 36" tall tire, but it'll do fine in snow/sand/mud type situations. Your best bet would be to look into 05+ ford superduty axles if you want to go to a one-ton set up. They use a ball-joint dana 60 up front, using coil springs and radius arms, and a 10.5" Sterling axle in the rear, and they can be bought as a pair for less than $1000. Look into U-joint offroad, chris builds some crazy *** ford vans, and he recently did a later-model bus, he'd be the man to talk to about all that.
I'm not real familiar with the axles under that travelall, IH did some funky stuff back then. But if it's a kingpin dana 60 under the front, that alone is worth $1000+. You might be able to part it out and make enough money to get what you need? If you're on facebook, go join the 4x4 vans page, tell em' Lunchbox told you to join up. There's a dude named Billy Huffstetler on there, and he's a bank of knowledge on the 4x4 vans, both ford and chevy. Plus people would love your bus!
I'm not real familiar with the axles under that travelall, IH did some funky stuff back then. But if it's a kingpin dana 60 under the front, that alone is worth $1000+. You might be able to part it out and make enough money to get what you need? If you're on facebook, go join the 4x4 vans page, tell em' Lunchbox told you to join up. There's a dude named Billy Huffstetler on there, and he's a bank of knowledge on the 4x4 vans, both ford and chevy. Plus people would love your bus!