Hi! Looking at a few used roadtreks, one is 92 roadtrek 210 independent. The other van is a 95 Dodge Ram 3500 V8 magnum. I've read a bit, but mostly I am still in the dark as to the quality of older...
You should start by flushing the brake fluid (very inexpensive) check all rubber hoses, belts, brake lines and also make sure the radiator is clean. Rubber brake lines deteriorate with age and heat. My Roadtrek I had everything I mentioned done and it was worth it for me ($270.) A lot had been done before I bought it so that was a big help. I had several Chrysler cars in that era and never once had a problem with an engine and I sold them to friends who waited to get my cars.