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Old 03-26-2012, 07:03 PM
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The issue you ran into with the galley plugs is due to the Vortec block having plugs that are larger and stick out further than Genration 1 small blocks, GM made this change sometimes in the early 90's. Also worth mentioning because they stick out further you must use a timing chain that is for Vortec blocks, if you got a timing set that is just for the sbc with oem roller cam the cam sprocket will make contact with the block right in the center of the upper galley plug. This can be corrected but the areas of contact will have to be ground down to create clearance.
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