Checking valve spring heights.

prorac1 said
They are a little rough. What year valve would I look for? Like 1973 ish?

It would be a total hack job. Lol. Hand lap and cross fingers. Lol

Mic the valve stems too. They may be pretty worn.

Enginetech V1589 are good replacement valves and pretty inexpensive. As stated, you'd just need a set of 4 groove keepers to use with them. Sounds like you've already got retainers covered.