Got this from the DMV.org site for Massachusetts.
"If you have a car, truck, motorcycle or other motor vehicle that's model year 1980 or older, and you purchased it before November 26, 1990, the vehicle is exempt from titling."
Its going to need a title for you to get it titled in your state. I'm in Texas and it was a nightmare getting my '71 Corvette titled (it came from a no-title state). I will never buy another non-titled car again. Its an additional headache you don't really need, especially since you will run into other headaches getting it rebuilt.
Also, if you look the car has Nevada plates, which means he didn't get it titled in MA for some reason or another.