| Andrea,
there were 5,451 tri-carb Austin-Healey 3000s built. Just the 2-seater (BN7) 
was in these low numbers of 355. Another 5,096 4-seaters (BT7) were built. I 
think the reason AH got the homologation was, FIVA did not differentiate 
between 2 and 4-seaters.
Eric
ONE consideration 
Tri Carb was built to make one little seriers of AH Tri carb car to allow the 
AH WORKS CARS to mount Tri WEBERS 
FIVA regulament don't consider the tipe or the maker of the carb only the number
If I remember right FIVA for this  omologation minimun series  number was 500 
cars.-BUT probabily I am wrong
Evidently AH have obtained the omologation
and quikly  returned to the more economic and  simple solution TWO carb
Andrea
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