For what it's worth, I grew up operating my dad's 48 Chevrolet Cab Over Engine Wrecker.
If it's the same shift lever, it's a short lever with a ball on the bottom that fits into a socket. They would last about 2-3 years and then, one day, when you went to shift, it'd pull right out of the socket. You'd have to stop, pop the ball back in the socket and then remember to hold down when shifting it.
As I recall, it was the only Cab Over Engine part that we kept in stock.
