Machine shop refuses to install exhaust valve seats

Had a local machine shop hot tank some small block 915 cylinder heads (1.88/1.60). I asked them if the previous work done on the heads included new exhaust valve seats? The shop "manager" (i guess) looked at both cylinder heads and pointed out a single chamber that had a seat installed and it actually looked a little like it had been pinned (I never installed seats, so I don't know the correct procedure).

Anyway, the manager told me the heads needed a valve job, and I suggested he install new exhaust valve seats in the other seven combustion chambers so they would all be compatible with unleaded gasoline. He swirled his indes finger around one exhaust valve seat and said no, there was was not enough material in the head to do that.

I told him sure there was, how does he think that one exhaust seat had already been installed by a previous owner. No kind of reasoning could change his mind to agree with me, that new exhaust valve seats would be advisable and possible and actually common place for all eight valves.

I had no choice than to pick up my cylinder heads after paying for the cleaning. Before I left, I took the valves out of the carton he had placed them in to find that he only had turned over 15 valves, so he had to run off and find the missing exhaust valve. Then I find one of the valve keepers was missing as well, and he brought me one (don't know if it belongs to my motor or if he scavenged one from somewhere else.

Anyway, now off to find another machine shop (I passed through another shop earlier in the day to see a Sunnen CK-10 in the corner used for finish honing). At the shop where I had the heads cleaned, their honing machine was another brand. When I asked them how they measured cylinder bores for final honing, they said they used a telescoping gauge. When I showed them a foto of a cylinder bore gauge with a dial indicator they said they never had seen such an instrument. I don't think I will return there for a long time.