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Are you talking about the 48Deg option? They leave about 1/2" more material/metal on the Intake side of the head and then it is like a W-Seires 48 deg Mopar head at that point. As a side note: This actually corrects problems with the intake manifold fitting/port alignment with the RP version of the 360-1 heads.

I was talking about the r3 blocks that were coming from Indy..it's my understanding that they were machining them there now..