I disassembled the engine. With the crank still in place I used a depth mike to get a measurement from the back side of the case to the crank shaft. I heated everything up and put it in an arbor press and pressed very hard. After it had all cooled, I made another measurement with the depth mike. The difference was .002”. I checked two other things. The cam drive gear has no slop. I checked the cam to make sure the two thrust washers were there, yes they are and they are the older plastic ones.
The engine is all back together and feels fine. It will be the weekend before I can test the engine again and report back. It’s 104 degrees out right now and I don’t feel like going out to run it in the heat.