Closed Chamber Heads

22racerMember

Prior to purchasing my 72 Pantera #3939 Production date 7/72, PI Motorsports installed a set of closed chamber heads. The invoice has the following numbers and I'm wondering if this is a part number:
AE 3713 877126 32001
Does anyone know the horse power increase with these heads? If I want to have an original appearance and the highest performance, are these heads the best way to go?

3/19/137:51 PM

Original Post

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