Anyone ever run Speedmaster Heads on their small blocks

I don't want bust anybody's bubble, but I wonder if any of you guys considered that it appears that Speedmaster heads are a copy of Edelbrock heads. Edelbrock is a great American company. They really support our hobby, and provide American jobs in Calfornia. This is what our country was complaining about! The Chinese don't honor Patents. They steal our intellectual property and produce a cheaper product. Edelbrock will suffer, and it will hurt American jobs! I know- but the price is so good- It bothers me.