Hey all, I am about to come in to possession of a rebuilt 12a that has never been run. It was rebuilt in the 80s and the compression is good but I was thinking I should replace the coolant seals in case they cracked. The engine turns freely as well and has been rotated monthly. Can anyone tell me how I would go about replacing only the coolant seals? I’m not interested in doing a full rebuild but what parts would I need? (Seals, and gaskets) Anything else I should look for?