I have had pretty good luck with the following process. I wrap the stock head in paper towels and then in aluminum foil and put the whole deal in an oven and bring it up to 300 F or so and leave it for several hours. After you turn it off and cool check the paper towels to see how much oil came out. The oil will stain the paper towels. Repeat until you get no more stain. Then soak the head with acetone/plaster of paris and see what comes up. Again stain is the indicator if anything is coming out. Once no stain appears repair any obvious cracks and such. Then remove just a bit of wood and rebed the head with Accuraglass for a perfect fit.
