Russ,
The P/N you list are probably the sensors I'm talking about. Your local Detroit dealer should put them on the counter in front of you to look at. Familiarize yourself with my picture #3: each of these sensors has a heavy metal tab which holds them to the engine block with a single bolt, after you've pushed them into the block past their "O" rings. Both are on the pax side of the engine (as installed in a Newell) and everyone seems to call them crank position sensors.
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