I have an option to purchase a 1968 383 complete rebuild long block out of a Road Runner .60 over. Been on a stand in a shop since 2003. Anything I should be concerned about. Possibility of seals, gaskets that might start to harden? Has been covered in plastic with no rust at all. The shop does get hot in the summer 100 degrees and cold as 30 degrees in the winter. Owner is a very meticulous. Super clean.