I've got my 235 torn mostly apart but I've found it to be badly rusted thanks to the fact that the valve cover had been removed decades ago which wouldn't have been so bad but in recent years one windshield and the rear window broke and it got rained and snowed on a lot. The head isn't bad and can probably be saved. All valves were shut thanks to some pushrods being loosened or maybe popped out of the rocker, anyway no mice got in. Now I got the rods and mains unbolted ang removed the crankshaft. It has some rust on some journals but now for the pistons, #1 slid out easily and appears to be aluminum and looks great with only the oil ring stuck but the others are tight. The cam and lifters are rusty and stuck badly so my question is do you think I should try to get everything freed up or is this block a boat anchor. Are there any good cores available anywhere or do I need to go a different route? I'll post pictures now, I hope. Any pointers will be appreciated. This truck has been on the farm since 1951, I have the original manual and the Bill of sale yet..