I installed disc brakes on the front of my 42 1/2 ton but kept the stock rear drums. put new wheel cylinders, shoes, springs, and emergency cables. The drums need to be turned but I cannot find the specs to see if I have enough material left. I don't want to spend $200 on new drums if I only need to spend $30 to turn them. Any leads to where I can find the specs? looked in my shop manual but could not find them.
