Since this is the raging post for FE big blocks I thought I might put my question here. Anyone know anything about 428's used as pumping motors. I ran accrost two of them yesterday. The id tag says 428, and the intake manifold casting number starts with d1. Does anyone know anything about these motors. Are they originally 428 blocks, or 391's bored to 428 specs? I understand truck cranks and passanger car cranks were different in the front snout area? How would I tell these apart? Thanks
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