273 Radiator for 340?

It's not that tough to accomplish what your after, My 69 Dart uses the original 273 with A/C 2949069 which is a 3 core radiator. I had the radiator shop move the lower hose connection from the left to the right side, had the radiator rodded out. I'm using the the pulley system from a 1970 and newer. I did use a 2785614 fan shroud and the MP clutch fan package. This is on a healthy 360 w/ Dynamic 3200 convertor with A/C ( old style Rv-2 comp.), P/S, P/B. It runs 190 with A/C on in Florida heat in traffic.