Hey guys I bought my grandfather's mustang from my grandmother after he died because he wanted it to stay in the family. The car has been sitting in a unaircontioned garage for the past 3 years and was started up maybe 4 times and year with a small drive down the street. The car is all original. Aside from the dry rotted tires and window seals that have gone bad what should be some of the first things addressed? I'm finding very generic info on internet searches.