[Spridgets] Trying to figure out where to get a plug

[stargazer1 at cox.net (David Ambrose)]

On 11/29/2011 12:58 PM, Richard Ball wrote:
> Pulled this info off of  the Spitfire/GT Magazine website.  Scroll 
> down to the section on EGR Valves.
>
> http://www.triumphspitfire.com/substitute.html
>
> Apparently it is 3/4 x 24 fine thread which is the size of the 1930 
> Ford Model A oil pan drain plug.
>
> 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