Rally dash oil pressure gauge issue.

Well... even if you did correctly identify your application as 340 Swinger at Rockauto, they don't separate the base model Dart from a specific year model 340 Swinger with the rally instrument panel. Their computers can only do so much.
Agreed. And knowing me I bolted it in and went with it even though it wasn't exact. i am mostly to blame LOL! I do recall the style you described, and I have the old one so ill throw it in and hope the guage made it.