1971 muncie date code

[Mr70]

Ron
Glad to hear you want to restore her.Like you,when others neglect,I see hope.
The M22 was the required transmission on a 1971 454 Chevelle.The M20 would only come on the 350/270HP Chevelle back then,the M21 not at all.
I don't know exactly what papers you have on this,but the Cowl Induction may have been added by the Dealership AFTER delivery of the car,by them.Thus he still paid for it,but not originally built with it.
The extra Number 1 is unsual,but not unheard of.Humans stamped these,so it's possible,and has been found before.Baltimore Plant,more then most.