My 94 GT has developed a slight vibration at highway speed and is pulling to the right a little under hard braking. Are these two issues related? what should I check for?
Sounds like a brake problem. The front wheel bearings are notorious for developing a wobble. I've had several cars come in, and I was amazed how much the front wheel bearings moved when I checked them with a dial indicator. I'd take your front brakes apart and see what you find.
94 and 95's were notorious for soft A-arm bushings. They allow too much toe-out at speed, leading to a shimmy. And if your passenger side is worse than the drivers side it might be causing the pull when the brakes are applied.