[64speed]

My machinist installed the threaded plugs that come with the Edelbrock heads into both heads for the Dyno. I don’t have an Allen wrench big enough to fit it and it’s HUGE anyone know what size it is so I can just go buy the right size bit instead of buying a full set of oversized Allen wrenches. My machinist is on a race tour till Wednesday and I am trying to get some stuff done.

[Scott65]

Just measure between opposing flats. That's the size.

[Bill Hanlon]

Depending on how huge, try finding a hex head bolt that will sit snugly into the plug. If you can, add a double nut locked together on the bolt and back it out with a socket.

[RocktimusPryme]

Mine were 9/16ths. Stick a 3/8 bolt head in it to be sure.

[STEELCITYFIREBIRD]

Originally Posted by Bill Hanlon

Depending on how huge, try finding a hex head bolt that will sit snugly into the plug. If you can, add a double nut locked together on the bolt and back it out with a socket.

Nice and resourceful!👍

["QUICK-SILVER"]

Originally Posted by Bill Hanlon

Depending on how huge, try finding a hex head bolt that will sit snugly into the plug. If you can, add a double nut locked together on the bolt and back it out with a socket.

With a vice and hammer you can make your own allen wrench, once you find a bolt head that fits.

Clay

[track73]

Originally Posted by Bill Hanlon

Depending on how huge, try finding a hex head bolt that will sit snugly into the plug. If you can, add a double nut locked together on the bolt and back it out with a socket.

Yup,I do that.