56 plymouth 4 door

The reason for the 4 door specifically gentlemen, to explain the madness a bit is because of the shape and location of the rear door on a 4 door it's shaped to the rear quarter and inset has a good striker location for the latch. It makes for a much easier chop to have a smooth preexisting bottom outer lower section of the door than to cut it up and fab a flat 2 door section and make it looks like it belongs.

with some drawing out and measurements, a decent 2 door driver in the area would work as well