I am not sure that I am correct re later lean burn engine temps, my +8 tends to top out at 90Deg C.
Even when stuck in traffic in a tunnel just outside of Naples in a Summer some years back when Italians were fainting in the street with heat stroke, I had issues with the starter relay so did not want to shut the engine down... hot exhaust on one thigh and hot gearbox on the other for both my good lady and I.... Suggesting I was about to put the heater on to assist engine cooling did not go down well with my passenger... ! Reluctant to type this but fortunately .... my +8 has not ever shown signs of overheating... Touching wood..(-: