Originally Posted by BusinessBus
I took it out for drive again. I've worked on cars since I could drive, and the symptoms of of this 50mph wobble are those of 1, unbalanced or two different (ply and tubeless) tires... 2, a tie rod... 3, a ball joint. I'm new to buses, but the same principles should apply. A family friend who is actually a mechanic also agrees that these symptoms are indicative to a tie rod or ball joint.
You don't say what chassis your 87 Bluebird is built on, but if it's a full-size skoolie, you have kingpins instead of ball joints, so that's one thing you can cross off the list. Replacing tie rod ends on a bus is just like replacing them on a car - they're bigger, but they're attached in the same way. The parts are fairly cheap, and replacing them isn't too hard (usually).