1966 Barracuda engine swap to a 340 Six Pack

Ive got a quick question hopefully someone can answer me. If I'm not mistaken, a 340 six pack set up should fit on any year 340 correct? I know they came out 70-71 with the six pack (i think). So does the set up work on earlier 340s? Like the 67 ive got? Or is there something that varies year to year? I mean really what would change (if it does) would be the intake since the carbs are the same between 340s and 440s.. right?


Man I've still got a lot to learn... and a six pack set up to search and buy..