Thin-wall spark plug socket?

DrCharles said
Thanks for the suggestions (especially the 5/8" hex plug info) Time to buy one (or eight) Denso plugs! :)
That would definitely be easier than modifying a socket, and cheaper than buying one!

The problem with making wrenches, etc. is that there just is not room for me to reach up in there and turn it. It's a perfect storm of obstruction by header, inner fender, motor plate, K-frame... there's a reason why I took a holesaw to the fender.

As Pishta pointed out above, stop buying 13/16 hex plugs. There is no real reason to use them anymore.

That will make life much easier. 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. If that’s what you have you’re kinda stuck.

If not, the 5/8 hex plugs are the best choice.