Yep- - - -that head once had a piece of tubing with a gland nut on it, and a one way check valve to pulse air into the manifold like an afterburner. They burned out pretty quickly and the head usually got threaded for a pipe plug.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!