How to properly warm up a Flathead

[26 lakes]

I figured the title would get you to look. I am in the process of braking down some stubborn flathead blocks. These were locked up and frozen real good. I fill the cylinders with a little brake fluid and use used paint thinner. I take a plumbers torch and light it. Use some common sense when doing this. No wind or flammables close by. Keep a five gallon bucket of water nearby. I will do this for an eight to ten hour period. I let it cool down between refilling the cylinders. The corrosion on the cylinder walls flakes off. I will shoot it all real heavy with the acetone and transmission fluid solution and let it sit for a week. I squirt down the valve assemblies at any angle I can get to them. I will do the other four cylinders the same way. With the heat you get expansion and the oil goes down around the pistons and the rings. If the block is froze up you have nothing to lose. Try it on your next block. It beats a B_H.