The Vacuum hoses thread made wonder, are Dealer Technical Bulletin changes done years after manufacturing considered factory original in competitive show judging on factory originality ? Maybe this is a question for POCI judges or the CRG.

Personally, I would consider a car judged for originality correct with or without some Dealer Technical Bulletin changes.

For example, would a '68 Firebird being judged be considered correct with the five factory TVS hoses or the T2/T2A Bulletin three hoses? I believe, yes.