honestly that rig is a classic i would build a different rig for that body and keep that thing as a crawler
you could easily build a full custom chassie for under $300 with fully upgraded parts that would work much better under that body
I hate shelf queens, but every good collection has them. With that particular rig, I would paint up a Betty body and put it on the top shelf.
A lot of nostalgia there for a lot of us. For many of us, that was our first crawler. And, that was the rig that really launched the crawler community from a tiny niche market to a mainstay in RC.
Sorry, not much advise here, but that rig takes a lot of us down memory lane.