MRL 360 Coolant Temp 210+
I would definitely have the radiator gone through. Ambient temps in the low-mid 80*s my 360 creeps to about 210* (Autometer gauge) or just right of center (factory gauge) in stop and go, and that's with the original /6 rad (recored with larger cores but still only 2 row), flex fan and no shroud. I definitely had issues before I got the timing and carb dialed in (fairly fresh rebuild). It would get much hotter with not enough timing.
Also, water wetter definitely helped my big block in my E-body several years ago. Obviously no good if you drive in winter temps.