Well....anything that eats that soot and oil deposits, carb cleaner,oven cleaner(careful it eats aluminum if you leave it)on inside only,small wire brush etc. Ware mask,read and follow label directions. While you got um off,match gaskets to logs,then same treatment to the heads,you'll be amazed what you find! After all that,polished those baby's. Then have a cold one,you deserve it,have fun with it.
