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I'm running out of the box Indy EZ heads now but after port work will these support a 12.5 to 1 512" motor? And what gains do think I would see using the ported heads and going from 975cfm carb to 1050 on the 470"?




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72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....