See if my info correlates with any other peoples knowledge;
I bought an A12 in 1969 from a performance dealer in Cleveland that my buddy sold for.
He specialized in the sales of MOPAR performance during the time when it was exciting. we also raced a sponsored car for them each year at Thompson Drag raceway.
I remember him saying that in 70, when the cast Iron manifolds started appearing, the 4 speeds got Al. and autos got Iron.
I never had this confirmed so it's hearsay, but if anyone was an ORIGINAL owner, they can chime in.
Just my memory, don't kill the messenger!! LOL
Joe
The reason I asked this question is I recently purchased a Superbird from an owner that owned it for 43 years. It is a 4 speed car and has an Aluminum Edelbrock 6 pack intake and was trying to figure if it was correct. The owner says it was on there when he purchased the car used. The carbs are correct for the car.
(They could have had either one, I think confused
It has been said on here that Mopar ran out of the cast iron intakes and switch back to the Eddy aluminum ones around the beginning of December 1969 shruggy
Maybe another internet myth work
I had a 1970 V code Charger that the scheduled production date was 10-23-69, it was sold new in the town I lived in in SO CA(Victorville) and it had a cast iron intake on it, I ended up buying the car years later and it was missing the original carbs and intake and Dana 60 by then. I found three other intake and carbs with casting dates in early October of 1969 real easy so one of them ended up on that motor shruggy
IHTHs)
The K frame date is 3429 which is Dec 21st of 69 so if what you say is true this could also apply as is the 4 speed theory.