From: David Ambrose <stargazer1@cox.net>
<<< > The Air rail plugs in the head are 7/16-20 by 1/2 inch long.
For a clean installation, use Allen head set screws (aka grub screws).
They'll seat flush with the top of the head and stay out of the way.
Cheers,
Dave Ambrose>>>
Those are what you use to plug the air rail injection ports into the top of
the 75/76 cylinder heads. I'm trying to figure out how to plug the larger
opening into the exhaust manifold (for the pipe from the air pump) that was
used from 77 to 79.
Thanks though!
Kim Tonry
Downers Grove, IL U.S.A.
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