Chrysler used these, 4160 had side fuel inlet, they where refered to as late model carb in 1971
The R-4166-A was a 1969 Mopar carb with Primaries of 15/64" and Secondaries of 17/64" dry float level setting. I'm not sure about the -1
Used on Chrysler, Imperial, Dodge and Plymouth 383, 413 and 440
I hope this helps.