It is likely that we will pull the engine over the winter to go through it should the compression not improve drastically by doing the heads. The cylinder walls have a nearly circular ball home pattern that barely broke the glaze. Generally this occurs when a diy'r attempts to complete a ring job without performing a complete glaze breaking hone. The new rings will not seat correctly. At least with the heads done, we can get it back to firing on 8 cylinders. Curious to know is anyone has any fresh 460 heads for sale? Might be cheaper than having these done?