There's one last issue that has me confused.
A-body "K" member 2883984 was for the 383 w/o P.S in '68. 288399 was for the 383 WITH P.S. in '68.
WITH? So Norm did sell'em with P.S. The factory in '69 did not offer P.S even tho the 399 "K" member was used by the factory in '69. Go figure..