A good friend of mine, worked for chrysler in the late 80's as a mechanic, when chrysler was having all the head issues on the 2.2 engines, he found a way to beat the labor rate, by not removing the head all the way off the car, he just lifted it enough to slide the old gasket out, and a new gasket in.
He also said only about 1 in 10 came back with a cracked head, but he saved a 1/2 day in labor by not removing the head.
He was on flat rate, so that was a 1/2 days wages in his pocket.