250 tune up advice needed

[old cool]

Here's the question: I have the correct 250 block for multiple years, but all of my bolt-ons are mid 60 parts. My block, on the other hand is a 1976 (dated 9-24-75). Hence, manual choke Rochester monojet is exact match to 64-66 carb. Distributor is old school; not HEI. Exhaust and intake manifolds were used from 1963 to 1971.
With all of that said, do I tune up using 1966 specs. I believe timing is 4 degrees btc, plugs are gapped at .350. And I assume since it is a 75 head, I don't have to worry about led additives. Oops, the head may not be '75. Guess ill need to pull valve cover.
I think im answering my own question; especially since i have points and not HEI. Plug choice, gap, timing, etc would be mid 60's?????
While I think of it, were engines built for 1976 all integrated heads? Mine is definately a non-integrated.