take a good magnet and check for thick bondo spots....if it runs you did real well.....if it were me knowing what i'd do now after diving head first into mine i would, with it all ready being a driver:
1. jack it up and industrial power wash the frame and underbody sandblast where needed and undercoat or POR15 it.
2. Replace and restore full suspension, steering linkage and brakes (one to two weekend job if you have all the parts)
3. Drain all fluids and inspect them for shavings etc....if all works and looks good fill'er up, tune'er up and worry about the "motor of your dreams" later.
4. The dreaded body work, only way to know what you have if it's not the original paint is to strip it down (grinder or media blast).
5. Replace any rotted metal.
6.grind, fill, sand, block sand repeat....for around 200+ hours from 80 grit down to 600. There is no such thing as a straight "all Metal" car, good paint is 90% body work, the care and diligence you spend here will be reflected (literally) in your paint.
7. Squirt color on it....
(this is when it gets fun)
8. Interior and trim
Take a look at my Photobucket its all there in pics...took me 8 months doing everything myself, but i had all parts on hand (pile of cash), and a flexible winter schedule owning a construction company in the frigid Motor City.....great buy and YOU CAN DO IT!!!....