polara71
Old Man with a Hat
I always thought the fins were typical of C-body HP manifolds, primarily from earlier, '69-'70.
View attachment 148676
Curious, are you positive it was a 383 you were looking at, and not the original 440 with a 4 barrel in place of the 6?
Dan @ph23vo needs to chime in here.....
70 & 71 not 69