4-Door with 340 from the factory?

I had a 68 Dart 270 four door 318 4-speed with factory A/C. I sold it to Bill Reilly who makes the AlterKtion k-frames. It was know 340 but it was different. I also had a 69 Dart 4-door with 318 and 727 auto that had the ralley suspension and 8-3/4 with tow package. Bought it off the original owner who ordered it. He wanted a Dart Swinger 340 but the wife insisted on a 4-door so he ordered everything he could to replicate a 340 Dart but could not order the engine...