The crankshaft pulley measures 20-1/2” in circumference and 2-7/16 from mounting surface to front. It needs the center bore opened up from the existing 2.380” to the Pontiac 2.465” which is on the tight side. My stock V pulley actually measured 2.472” but I like a snug fit. Next, the four holes will need to be drilled to bolt onto the Pontiac balancer. I happened to have a large socket that fit the bore nicely to align the two pulleys and used the Pontiac one as a guide.
More to follow...
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