Quote:

Are the MP heads open or closed chamber? Mancini doesn't state, it just says 84cc chamber. I assume they are closed chamber.


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Yep, they are closed.

72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.