My pressure plate displays the same de Tommaso Isis and part number as Rocky's pressure plate. It also has the same bob-weights as Rocky's pressure plate. I have always been led to believe it was original to 2511. I have had it locally rebuilt twice in my 50,000 miles of ownership and it never had any issues transmitting approximately 300 RWHP. It did obviously wear out and require rebuilding, but it was up to the task for which it was designed.
Larry
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