So glad it is not the block bored to 0.060 oversize.
Radiator was re-cored by a reputable company as I retained the OEM number and Chrysler star on the upper tank.
Car always did this after rebuild.
I will ck out this problem more when I return. The common item in this issue is the gauge in the dash so will ck with another gauge plus IR gun when I return. A new 195 deg stat will also help.
Great feedback and recommendations to try. You guys are the best.