Pre-purchase tips on 1985 Ford e250 Okanagan?

I've had a few van campers over the years and from experience, I've found that the brakes on a 3/4 ton van has a tendency to be too light duty especially when it's loaded with all your gear. Heck I had a 1989 e350 one ton Ford Falcon and the drum rear/disc front brakes were barely adequate. A 1985 vehicle is 16 years old and built with old technology. I say think twice and if you're still wanting to buy it, remember, you've been warned.