Quote Originally Posted by pat mccarthy View Post
good roller have there name stamp in them gold mostly are crane but comp sells gold rockers harland sharps are red bronze but there knock offs that look alike them . the numbers do not sound right they should be cast in side the head like 30040 oval 30620 rec ports but heads could be a very early set of heads
I was in the process of searching them when I seen your post. Here a link to what I found:
World Products - MERLIN Rectangular Port Iron Heads