At idle the fan can't pull any air through the rad due to there being no shroud.
The shroud makes the fan bring air through the rad intead of beating it into submission.
192 is the stock temp stat on the later Magnum engines. IIRC every MoPar I have ever owned had a 192 stat. My 92 Dakota can idle all day in 95° temps with the AC on and not overheat. I tried a 180 and it wouldn't warm up and I got an error code for not getting warm enough.
Try a shroud before throwing money and parts at it.
