Looks complete. Why was it parked? Will/does it run? I'm glad your son got it.
I see so many tv shows where they pull a car out from somewhere, and it runs, after some work. Why were they scrapped, and why hasn't someone grabbed it/them over the years?
When Roadkill pulled their 69 Mach I out of a yard is an example. Around here, those kinds of cars are loooong gone from junk yards.
EDIT: They were probably scrapped because at the time, they were just junk, not worth fixing. But to sit there for years?