Louvered Hoods

[Richard Hardison <cobra@airmail.net>]

Can anyone on the list document pre-1972 use of a louvered hood on a TR2
or 3 in a United States race event.  If so, are there any pictures?

We are completing the 1959 TR3A for vintage racing, and want to explore
all vintage legal ways to get air out from under the hood.  There are
several other options, but louvers look best, if allowed.

Thanks,

Richard