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There are a few things that you can look for to identify a Procomp cylinder head. First, check for the Procomp logo on the head. Second, look for the part number on the head. The part number should be stamped on the head near the valve cover rail. Finally, check the casting date on the head. The casting date is usually a 3 or 4 digit code that is stamped on the head near the Procomp logo.
If you identify a head as a Procomp head, it is likely that the head is a good quality head. Procomp heads are made from high quality materials and are designed to perform well.