<VV> Could really use some help IDing a part

[Kent Sullivan]

Hi,
 
I hope someone out in Corvairdom can help me ID the following vented battery
cap cover:
 
http://www.corvairkid.com/articles/images/mystery_cap_cover.jpg
 
This is designed to work with a battery that has screw-in caps. It is very
similar to one used on '65 - '69 Corvairs with the HD battery option (RPO
T60):
 
http://www.corvairkid.com/articles/images/corvair_cap_cover.jpg
 
The main differences are that the mystery cover is longer, to accommodate a
wider cell-to-cell spacing, and the nipple is on the side instead of on the
top. The spacing is pretty wide; I am guessing about a group 27. It is
definitely wider than a group 22 or 24.
 
My guess is that this cap cover was used in a high-performance application
where the battery was in the trunk. I thought it would be a GM product since
the part is so similar to the Corvair application but I guess the same
supplier could have sold parts to different auto manufacturers. Very few GM
cars from 1960-75 used a group 27 battery and even fewer mounted the battery
in the trunk. I have tracked down some (like a Buick Gran Sport) and no
dice. Corvettes from 1968-75 used vented caps but they did not use a
two-piece cap cover that I can find. I have talked to several NCRS folks and
they have never seen anything like these covers.
 
Could this possibly be a GM marine application?
 
Mopar and Ford seem to have a lot more cars with group 27 batteries than GM.
I attended a very large Mopar meet this morning and no one had seen these
cap covers before. And, the cover did not fit those with original-type Mopar
group 27 batteries--the cell spacing was different. (The cell spacing is not
uniform across manufacturers within a group designation.) Several folks
described to me the vented caps used in some Mopars (hi performance
battery-mounted units). They had six hoses--one for each individual cap.
 
Maybe this is a Ford application?
 
Thanks!