You can use a 65-71 intake on the #62 heads without a mismatch problem, or the aftermarket aluminum intakes will fit both early or late heads without a problem.
Then of course you can block the heat crossover with plates, but that renders the choke inoperative. To handle that problem there are electric choke stats that can be adapted. The supplied block offs will eventually burn through and you'll be back to square one. On race cars I have cut my own plates from sheet stainless steel, but driving a car on the street without the crossover heat can be miserable in cold weather.
Personally I prefer to keep the heat crossover operative with a hot air choke, but you can handle the mismatch which ever way you'd like to.
In your situation I have linked to an article that states if you have a late intake on early heads you can use a late gasket set to seal it without resorting to block off plates.
Link to Wallace Racing explaining the mismatch problem, and how to solve it with iron factory intakes:
http://www.wallaceracing.com/intake-crossover.html
I believe this article will answer your questions.