I would want a look at the other side of the heads... Corrosion in used aluminum heads can render them worthless in a hurry- to someone looking to buy. You may be able to run them and consider nothing lost but the time and gaskets...
The intake is nice, the carbs are too if they are not badly treated. I would not run the one without the choke installed. For prices, I would look at the people reproducing the Navaro intake... And the internet.
I think your parts will work on any 24 stud engine, 59ab and 81a easy, with 8ba you'ld have some holes to plug.
Karl