The port openings on the red cap motors are wider than the black cap. It is a possibility to put red cap jug and piston on the black cap lower case halves. Not sure how the performance is compared to a full red cap motor but I am almost sure there will be some gain.:wave:can a black cap be updated with red cap parts? a few of us were having a conversation about and wondering hanks.
I have black cap jugs and rings. If anyone needs them. You can combine the motors according to Randy Brown. They will be teched as the new style motor if I am not mistaken.the way i understand it you cant combine the 2 motors if you want to be QSAC legal the problem with the black cap is they dont make the rings or jugs anymore