Great question ! This is the reason why CCOA has started a special registry recognizing the 71-73 Q code cars . We are trying to get as many registered to the site to document and get photos of these rare cars ! So , the short answer is , after owning two original Q code cars ,Speaking with many experienced part suppliers , club members and scanning every Q code I could find .here is I what I know so far . 1971 only 1 Q code made , no idea what lid ! In 1972 most were chrome, some displayed 351-4V some 351-CJ . In 72 the CJ was rated 262 Hp motor w “ quite exhaust package and standard 12” torque converter w/ C 6 transmission standard . Also there was a Cobra Jet performance group package which was optional , the automatic C6 included a higher stall 10 1/4” torque converter , “ sporty exhaust “ and a better suspension package . This package was also included on all 4 speed cars . One might think the cars equipped with the cobra Jet performance package would have revived the 351-CJ decal ? Not so , I have seen the 4V decal on those packaged cars ! Some people say it’s whatever decal they had
at the time . By 1973 I have not seen ANY w/ chrome lid yet . That does not mean they don’t exist, just still trying to get all these cars registered and documented so we can get a more accurate picture . By the way , I have documentation of two 73 Q code models , both blue lids one with 351-4V and one with 351-CJ . Both cars have under 20k miles and are original!
