[GOSFAST]

Hi Dennis, thought I was about to get proved "wrong" here, like I said, it's only really an issue with the Offy heads, believe me!

While we're doing the builds here, not that often with the Offy's, we do take the time to make certain a conventional, over-the-counter, plug will fit with no effort!

If you go back and "collect" all the dimensions I posted up here you should find all are "on the money" for the most part!

On a side note with respect to Anthony's photo above it appears to me to be less than .250", maybe more like .180" or so? hard to tell from the photo.

Thanks, Gary in N.Y.

P.S. Here's a customers OEM C8CM Canadian casting we tried to repair (no luck so far) with an Autolite 216 plug, fits perfect, exactly like it should!