mike, I just got the vin on the '66 dart GT. LM23D62------ I know the D is for the engine, but the decoders I am using say 273-2bbl. Non of the decoders show a 273-4bbl. You seem to be knowledgable in this vehicle and any help is greatly appreciated. Bob.
The engine code is on the vin tag but the 4 barrel designation is on the fender tag under the capital letters "AB". The 2 barrel is #31 and the 4 barrel is #32. That info will also show up on the build sheet.