My Suburban with stock suspension and stock 248 six will drive 70 mph all day long. The tranny has been changed to an SM319 OD. I have power brakes with discs on front. I have taken several 1000-2000 mile trips in it. You don't have to have a modern frame and a V8 engine to make a driver out of an old truck.
That's true, but it's a lot more comforting if you do. Just giving my opinion.
