Your color should be turquoise, IIRC 1971 starts the discussion of whether non-HP engines are turquoise or blue. (383-4 in a C-body is controversial, vs B-body, for whether it's an HP engine, so don't get hung up on that for the purposes here)
1971 440 T-code Engine repaint -- questions and opinions?
The accurate color in spraycan is difficult to obtain. Mopar's version is now incorrect hue, reportedly Bill Hirsch has a good one but pricey and/or weeks to obtain?
I've found Detroit Diesel Alpine green is a reasonable substitution unless one is a purist.
It is a bit lighter than this picture shows, though, look at the water pump vs the front cover, which is the correct Mopar turquoise from Summit.
Here are some samples I did, the 'original' is an old can of Mopar paint from Summit.
This is the closest I've got for no AC.
Is a 71 Polara copcar, so the paint color is iffy, breather on the passenger side VC and the aircleaner are different.
71 has multiple hoses off the breather and 1 wraps around back of the aircleaner to connect on the driverside snorkel.
Here's a 70 Fury but with AC.