I took my time measuring depth and threads[8] on the set screw,drill bit,tap and the 5/16 8-32 screw[0152806] sits flush with the edge.I ordered 100 brass set screws from fasten all[2.65$] that will be in Tuesday and I can drill a few and give it a try.

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GOTBOOST!New improved with Victor heads.
http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/