Believe it or not, alot of young guys wouldn't know what the hell to do with an older vehicle. Especially as far as diagnosis. They don't have a Check Engine light to tell them somethings wrong, and they don't have an ALDL to plug into to tell them what's wrong so they are lost puppies.
I know a younger guy, has put 4.6 motors in his Mustangs and had no problem. Put a long block in his dads old Chevy truck and he was lost as hell. He thought you just put the distributor in, and hooked everything up and the igntion timing is right.
Not with out cam sensor, crank sensor and an ECM. So I had to show him to pull up on #1 TDC and stab a dizzy. Pretty funny really. He thought he knew everthing since he can do just about anything to a Mustang GT, but he's as worthless as a sore dick on the most basic auto systems. God forbid if he has to set points and dwell.