Not the same heads but I recently did some 452's , 1 to 1.5 cc difference , but I did a bunch of machining to the open part of the chamber.

I just did some math and you are looking at .27/.36 difference in compression from the 82/83 to the 86, I used a .030 over 440 for the calculations. In a mild street motor that's probably not that big a deal.