Doing it right -need some advice

Looks good! Like above, if you can, find out how deep the pistons are in the cylinder. The cc the head. And let us know what head gasket your using. These numbers will be the compression static ratio.

The Edelbrock RPM package is fine IMO except the camshaft. I find it wrong for a hot street package like there selling. Edelbrock says “Matched” which is a buzz word some can’t get passed and others know it for what it really is, a gimmick. My old uncle couldn’t get passed that. He hated the Performer package a lot. It made him very angry. So he came to me for advice. He just kept saying over and over, “But it’s matched, but it’s matched…”

In your case, I would not go big on the cam since your looking to do an overdrive. In all honesty I’d use the cam you have now and see how it performs. That’s if you like the rpm range it performs in now. 218@050 is pretty small and will work basically in the 1800 - 5500 range in your car. With the OD, it should be Hwy friendly.
I would t go to much larger but I would seek more lift. As to take advantage of the heads air flow abilities. Perhaps? If it is within your wallet, Adding 1.6 rockers will help.