318 cylinder head upgrade

I have a 318 in my 71 Dart, I swapped the cam to a step above stock, Edelbrock intake and headers. The bottom half is stock. I am considering a head swap but with the pedestrian 8.5 - 1 compression ratio I want to select the proper cylinder head to not decrease the compression ratio further. Looking for options and opinions.
Thanks in advance.


Get a 66 or 67 273/318 head and give it some porting and put 360 valves in it... The smaller combustion chambers on those heads will bump your compression up about 0.4