Re: decal sheet comment.... Look here:
As far as I know, the 1975 Dart Sport was equipped with a 360 V8 rather than a 340. How much effort would it have taken to provide the correct stripe?
Okay , now I see what you mean . 1974 was the first year for the 360 in High-Perf vocation ; 1973 was the 340's last year .
Either way , and as Mark pointed out , those style of stripes are not of 1974-1976 vintage anyhow .
What I do recognise that's (potentially) good is the Calif license plates ! The "L" = 1974/ 1975 issue plates . Hopefully they're to-scale .