The fendertag you posted is interesting. It indeed verifies it came from a A56 'cuda340 package w/4spd. Like many, it is not heavy on options, as they were Plymouths version of the low-option Swinger340. What is interesting is that all 'cuda340, 'cuda383 and 'cuda440 came standard with the twin hood stripes, lower body stripe & blakout, and of course the decal call-outs on the fender. Your tag has a V78 code in it, which if I am correct means it was built as a stripe-delete. Never seen/heard of that myself.
Grant
