[Fot] Cold Air "Boxes" - Historical Question

[Group44TR7 at aol.com]

I am not sure that I am using the correct technical term for this item. What 
I am referring to is the modification and/or replacement so that cooler air 
from outside the engine compartment is being provided through the air intake 
system.  
 
        Does anyone know the approximate date as to when this modification 
would have been addressed in SCCA regulations for DP and EP classed cars? The 
Group 44 TR7 does not have an cold air box, however the Huffaker TR7 (ex-Lee 
Mueller) has one. Would this modification been allowed at the 1976 runoffs in 
which both car competed against each other ?
 
    I do recall ever seeing this cold box setup on pre 1972 production 
vintage racecars. Just wondering when this happened so that when the current 
"vintage racers" are reclassifed into "ancient race cars", and TR7 become vvintage 
race cars, that we know when this happened. :)
 
Cary



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