Holley/Mopar '6160' carb

My cousin's 1972 Polara 440 came with a Holley 4-bbl. with "LIST-6160-1" stamped on the choke tower. Not much info about them online, only that they are an OEM Chrysler carb made by Holley. I have a new 360 Magnum in my '70 Duster with a 625 cfm Carter AFB that runs OK but not great (runs a little lean, needs tuning). Would I notice a difference in performance if I rebuilt this old Holley and swapped it on vs. tuning the Carter or is it not worth the trouble?