My bad, I did not pay attention. I read the thread late last night, after a really long work day. I'll blame that fact for why, in my head, this car was a 1970. Of course, this is a 1971, not a 1970.
@robio's air cleaner thus looks like the correct 1971, not a 1970.
According to
Nick's Garage, the "1970 383 and 440 4-Barrel (...) breather hose comes off back of unit. Snorkels have straight crease line on their right and left side." In contrast, the "1971 383 and 440 4-Barrel (snorkel's) breather hose coming from left snorkel. There are two versions of the right snorkel design. Some of them have a straight line running diagonally and other have a hump in the line."
PL21T1D204307 (if I decipher the tag correctly --
@robio, pls confirm) has the same
air cleaner as Medina, my 1971 T-code Monaco.