Two cars finned in the rear, all others are unfinned.
All SS's have finned fronts so far. So I broke out the SS's to help see the other data.
Compiled by date, engine, front / rear drums, and comments: manual or power brakes or AC.
67:
02C LF7 unfinned / unfinned manual
?? LF7 unfinned / unfinned manual
68:
early LF7 finned / finned manual
10E LF7 unfinned / unfinned
11B ?? finned / ?? AC
12E LF7 unfinned / unfinned manual
12E 327 finned / finned manual
04A L6 NOR unfinned / unfinned manual
04D L6 rag unfinned / unfinned
06? LF7 finned / unfinned manual
06B LF7 unfinned / unfinned
06D L30/M20 finned / unfinned
07C L6 unfinned / unfinned
07E L30/M35 unfinned / unfinned
?? LF7 finned / ?? J50 AC
?? LF7 unfinned / ?? Manual
11D SS396 finned / unfinned
02E SS396 finned / unfinned
04A SS396 finned / unfinned
06A SS350 finned / unfinned
07D SS350 finned / unfinned J50
?? SS396 finned / ?? J50
69:
01C 307 finned / unfinned
02D 307 unfinned / unfinned