Early A mini starter question

then i guess tti is very limited on buyers,,, or they need to do there home work and get back to the drawling board,,

i remember several years ago when tti first started out,,they gave me a flyer at the mopar nats,, i believe when it was in indy,,,advertising headers for ALL A bodies,,i asked about 1966 they then told me sure same headers,, i laughed at them to there face,,told them the early A cars are narrower then the 1967 and up,,,next advertisement i seen was for 1967 and up,,,

these vendors jump in and dont do there home work,have no clue,,what is ans what isnt,,,