[Tom Goldman]

not specifically in the rule book to my knowledge.
I was told by the Tech dept many years ago it was ok as long as the stock latch and hinges were retained .
it can only be considered a safety improvement, especially at the speeds we're seeing in S/SS.
A lot of the cars from the late 60's and early70's [like my and Jeffs AMX's] have so much hood in front of what is a realy wimpy latch, it just makes sense to use them .