It's just been sitting A lot, even before you got it. 13k miles in 65 years.... I had planned on doing valve cover an oil pan gaskets just to try to keep her from ruining the new paint but the major build-up of crust in the water pump and timing cover area have me worried about the head gaskets because those were metal and there are certain passages that the head gaskets purposely block off. If those specific passages rust through I could hydrolock an engine. And while yes the same things could have happened on my blue century, that car had a hundred and fifteen thousand miles on it, so if something happened it was probably near time for a rebuild anyway. In this case I have this perfect engine already out of this car if I repainted it all stuffed it back in and then blew a head gasket you better believe I would be parking at somewhere and getting out of the hobby. I also know that that rear main seal is only rope and having sat for as long as it has I bet you it is very crispy rope. So its not just you... it's just the fact that it's a low-mileage car over all these years and the engines already out of it.