[funrunr]

Thanks guys, although I did not check the cc's like Kube suggested, I did compare side by side with an iron head. Other than the obvious aluminum VS steel, they appear to both be the same size. I'm going to conclude they were just a stock replacement head except aluminum. The company was in Illinois from 1890 until 1962. Not much other info about the heads or company readily available without much investigating.
As always, I appreciate everyone's input. Have a great day