That's a pipe threaded cap. Your friendly local car parts store should have those... In a pinch, a hardware store will do.
 
Larry Shouse
----- Original Message -----
Sent: Tuesday, June 06, 2006 6:08 PM
Subject: Re: [Chevelle-list] Big Block Head plug

I rebuilt a set of 396 heads and I am missing the big round bolt in the frount of the head, does anyone on the list know where I can get one? It has the square hole.
Thanks
Joe P.

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