[GOSFAST]

Offenhauser has always been a problem with getting the spark plugs where they should be sitting?

Over here we use the Autolite 3924, .750" reach, with a .125" spacer on the top side!

Occasionally we also "fire-slot" the spark plug holes on many builds!

Thanks, Gary in N.Y.

P.S. We make our own spacers as needed for each individual job in the door with Offy heads. See photos below here. The left photo has a .750" reach plug with a .125" spacer up top