Welcome....best of luck with the work ahead...There are three main companies that supply parts for these cars. Year One, National Parts Depot, and Classic Industries. They all have some form of downloadable or online catalog. These are good for reading, you see alot of pictures of parts and can compare to what you have or dont have on your car. (Yes my wife reads Debbie Macomber novels, and I read catalogs!)
You can find parts from other suppliers, but these three really help when you are just trying to track down info on the different years and different parts.
IF...for some reason you find the car is to far gone to work on...I'll buy that engine!...I need a 68 WQ to make my car period correct.