SB 318 Wanting to build for a 67 Dart GT

I don't want to sound like a Dummy here.. But is there a way to tell what cc the head is buy the numbers on the head? Both heads have the same number on them 4323302 and 284.. I've been running mopar for about 10 years and am on 2 or 3 different mopar sites and ant found 1 person that could tell me how to tell the difference between the heads..

The thing I don't know about heads is I see pistons listed all the time that say 9 to 1 with this head or 10.5 to 1 with this head and so on.. Same piston just different heads.. May Dad has been mopar all his life from racing to big street car's and can't tell me a thing about the different heads..

I was planing on just re ringing this motor and all new gaskets and seals And re-lapin the valves.. The car has headers in it and 2.5in ex and I want to say it has a 2500 stall converter in it.. I was thinking about going with Roller rockers but don't Know the difference between the 1.5 and the 1.6??

And I'm sorry about my post being so long.. I just ant real good with words.. I may not be the Smartest crayon in the box, But I am the brightest.. LoL