Thin-wall spark plug socket?

yellow rose said
The only time you can’t use a 5/8 hex plug is if you are using OE big block castings. They take the J series 13/16 hex, 5/8 reach plug.

Unfortunately, for now, I do have iron heads.
This winter I'll be putting on the PRH-massaged Speedmasters, and 5/8 hex plugs sound like the way to go. Will doublecheck to make sure they fit my new heads first ;)

you can try and find a suitable 5/8 plug here

Thanks for the link!