273 Numbers Matching car. Should I rebuild or swap engine?

Sedanman said
I yanked my original 67 273 engine and trans that needed rebuilding and put a 340 in it. If the next owner wants to rebuild it back to stock I have all of the hard to find stuff in storage. The head gaskets are hard to find for 273's. IF you want to rehook up all the a/c stuff you need to stay with the 69 and older timing cover,pullies,water pump,brackets. The compressor is designed to fit the 69 and later water pumps (cast iron),70-up is aluminum and requires different compressor brackets,pullies,alt bracket,radiator,hoses,shroud.

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Congrats on finding a 340... I looked around for one for the dart but they are hard to find. My '70 CUDA was a 340 car, but the guy I bought it from replaced it with a 440 4 barrel (and sold the original 340). I just upped it to the Six Pack with an original '70 intake and new repro Holley Carbs and it's running like a beast. I wish that he had kept the 340 and that it had come with the CUDA which would have solved my problem. I would have tossed it in the Dart and put the 273 in Storage. :-)