Originally Posted by knight hawk
everything has checked out, I even pulled the drums off again, and re-checked the cyl sizes. After alot more research, I think the problem is main brake line from the front to the rear. I think it's too small. It's been replaced at some piont with a 3/16, and I'm told it should be 1/4 to the rear then splits off to 3/16. Supposed to make it a tad slower to rear. We'll see...............
Changing the 3/16" to 1/4" will not make any difference at all. The 3/16" is fine. If you were to put larger diameter wheel cylinders on the rear that would slow down their activation and reduce the pressure applied to the rear shoes. Adjusting brake balance by playing with wheel cylinder diameters is something that is rarely ever done. If all your brake system is in good repair just add an adjustable proportioning valve in the rear line and that will take care of your problem.