Interesting Info.
I called the number from the vintage Klem research website.
I was told the guy that did all of klem's porting was still working there but was out sick. I never did get to talk to him, I called two times. They did tell me they still have the port dimensions. The pipes were made be pro-power.
If Klem doesn't have the cone patterns then does pro-power?
Maybe someone on this site can measure the Klem pipe and we can have it reproduced?