Hi all, another noob here. I am restoring my 69 AMX that I have had for about 20 years. I have been working on it on and off for the past few years and am ready to start on the engine. I want to use the later model dogleg port heads on the 69 390 block and would like to know what machine work is involved in doing this. I have a set of heads, but don't know the specs on them or what engine they came from. I dry fitted them this afternoon just to see how close everything lined up and they seem to look OK except that the front and rear seal gap btwn the intake manifold and block looks a little wide. The locating bushings are a different size too, apparently for the later model 1/2" head bolts but that is manageable. I was told once that the deck height was different on 70 and up engines but don't have any real data to go on. What needs to be done to the heads or block if anything?

Barron