Fumblin,
I used Champion J6C plugs in my 216. They work great, and I didn't have to adjust the gap.
The best part is that I was able to get them at my FLOAPS. (Friendly Locally-Owned Auto Parts Store)
Although, I did get some friendly flack from my guy at the store. It seems that he'd not see one of those J6 plugs in quite some time. And don't get me started on those wires...
Also: I think my grandpa may be persuaded to part with one of his spare cranks. I'll ask and see if he wants to get rid of one, if you're interested.