for an hour to inspect a car for me transportation provided to car and a generous stipend for an hours work. someone around Holbrook area a plus.

take it to a body shop!
mechanics open the hood and listen to the motor.duhh!
a good bodyman will look at every friggin' nut and bolt on the car, and tell you what was done, when, why, how.
if it ain't factory, we'll find it
:D
throw a $50 down and ask them to "pre-sale" inspect your car.
good luck.
mike