Rare Dodge Dart GT? Which engine is this?

68 saw the 340 in the darts and Cuda and the Hemi was put in the a body along with 383s and 440s
Why do people always forget the 67 Dart GTS 383 3bbl


But we are digressing from the OPs question trying to figure out what motor is in the car with our enough info.

Let's wait till he posts some more photos and locates the casting numbers.

Maybe someone with time could wright up a checklist to getting it fired up.

Keep it simple, just the basics, it does not need to run and drive just fire up.