I blew the edge off #4 exhaust valve 200 miles from home. I limped home and ordered a new casting w/o jet valves from Clearwater. Resumed the trip and put on 1,000 miles or so then checked the compression pressure yesterday. Old head ran 145-160psi with the new head 2-4 cylinders are at 186 and #1 is at 198psi. The FSM says it should be 170. I ran each test 4X with a good/accurate gauge. Anything to be concerned about?

It seems to be running OK except for a rattle/knock under light load that's in the lower end, probably #3 cylinder, but that was there before I replaced the head.