yes there are different cam gears.
mike norris hepled me out this is the GM # 12586481 for the 4 segment cam gear the uses the 3 bolt mounting and the front cam pick up.
i changed the reluctor and pick up (grey Pick up fro 58 tooth)
i am also using the GMPP comp harness and fly by wire gas pedal.
i also ordered the HP tunner software to help tune the comp, turn off the knock sensors ( the iron block does not have the same mounting location , i was told that the knock sensors are esentially tuned microphones and changing them from an aluminum block to an iron block would probably cause problems anyway.
yea all this stuff just bolts together????? sure it does
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