reported outbreak of barret jackson syndrom in OK

Engines , etc. , didn't have any ties to their designated vehicle via sequence number / plant code , until '69 or '69 ( i.e. , no such a thing as "matching numbers" until '68 or '69 ).

I thought that disc brakes (non-assist) were mandatory with the 383 in 1967 , and were optional in '68 and '69 .