710 Cap Help Needed

[John Caffrey <jdc6@lehigh.edu>]

I purchased a used aluminum valve cover on ebay recently without a 710 
cap. I'm not sorry I took a chance because the casting has more room 
inside than the other versions for 1.5 roller rockers. The spare cap 
that Moss lists doesn't fit, and I'm hoping one of our list members will 
recognize the cap's original application. I have a closeup picture at 
the link below, and TIA for taking the time to look.
http://www.spritespot.com/gallery/album09/valvecover
John
Fogelsville, PA