64-66 abody radiator brackets for shroud

Quick question 65 Dartman- in your parts book do you list a radiator ending in 28 and 30 for the 66’ abody? I sent my 66 273 Abody radiator for auto ending in 28 out today for recore and I kept my manual trans 66’ radiator ending in 30. Both have an “AC” stamped in the top tank left side - right side has the part number. I’m curious if the “AC” is for air conditioning or just a build code.

I will check however my parts book is for 65 so the numbers might be the same or not. I would venture to guess the “AC” would indicate a radiator for air conditioning.