Finishing the operation - procedure is really this simple. Just take your time and the end result will justify your patience.
Tools required - flat file, drill, chamfering tool (or a large enough drill bit to chamfer the hole edges by hand), a sheet metal screw long enough to grip it with a pair of Vise Grips or a slide hammer, and a drop or two of oil to lubricate the "o" rings before installation. Plugs were sourced from Quadrajet Parts in NJ, a great parts and carb service source. All it takes -
Regards,
Steve