Yup... But that wasn't rust... It was very fine powder that vacuumed up.. I put a bit of it in oil and it dissolved immediately...and it wasnt gritty between my fingers... And I think the crud in the cooling system is from sitting. It also dissolves immediately in water. Freeze plugs all look good from outside and there doesn't seem to be evidence of coolant splash from overheating...and I just spoke with the old owner who told me again that it ran fine when parked and was started monthly but nobody ever needed to drive it so all good signs considering. Truth is I'm at the point of no return anyway. The next few days will tell.We've already been over this in another thread about the oil pan with replacing a timing chain/cover gasket, pfffft is this the car with the rust inside the valve covers?
IMO with all the crude clogging the two water passages to the block I'd say the motor was overheated and cooked and you really at this point don't wanna see whats in the oil pan.
Get it running enough to do a couple 500/1k mile oil changes and see how the engine is from there.
(edit) You wanna ruin a good shop vac?
(edit2) OMG yes it is.
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Repeat Batman That's Nasty meme