I never had a J or K, but from my experience with 60-62 vehicles, the non-A/C cars didn't have fan shrouds, and the A/C cars had fan shrouds that were designed to accommodate the radiator hose on the far passenger side of the top tank. A/C cars also had viscous fans while non-A/C cars did not. The exception was high performance letter cars without A/C that had the A/C style viscous fans, but no shroud. I guess that was because the letter cars were expected to be running at higher rpm, with or without A/C, so it was felt the viscous fan was needed either way. When I moved to TX, I began investigating adding a shroud to my non-A/C G. I bought a shroud at Carlisle and slightly modified it where necessary to clear the upper hose, and it bolted on just as it would on an A/C radiator. Probably the "right" way to do it would be to get an A/C radiator and fan shroud, and change the thermostat housing and upper hose to look like an A/C car that is missing the compressor for the best form and function. I had once parted out a 62 New Yorker with A/C, and had hung on to the radiator and shroud for years without using it (my G coupe I had at the time was factory A/C, so already had the correct radiator and fan shroud). I finally sold the A/C radiator and shroud at Carlisle years ago, before selling my G coupe and getting a non-A/C convertible G and moving to Texas. Go figure!