Thanks Doug and George for the comments. I disassembled the heads and inspected all the seats. There are no chunks missing or cracks in the exhaust or intake seats. l won't have hardened seats installed.
The valves are not the original OE triple groove valves, but I think I'll swap all the valves out, get new seals, have the seats and valves ground with a 3 or 5 angle valve grind and move on. I will also changed out the springs based on some of the sticky's George has posted, likely PAC 1900's.
The machinist said he would check the guides (intake guides have been done) and also clean up the pockets under the seats...which would be fine.
At this point, all I want is a reliable set up so I can jump in a drive a few times a week and not have to be concerned about reliability issues.
Thanks again for all the experience and knowledge.