Brendanm,
The J6C plug is the part number for a Champion 823.. it has a 14mm, 3/8" reach, 13/16" hex head, copper core.
The plugs in my '46 216 engine are 10mm, 1/4" reach, 5/8" hex head, and are Champion 842's
NAPA has them, but had to order them.. they are supposed to be here today.
I don't think I have any need for the crank.. but I appreciate the thought!
Jed,
Come hell or high water, the sidney show it is this time next year!
I'll bring a crank hole cover with me, provided you don't end up paying a visit to the Postmaster between now and then!