Battling overheating new 360 build

Welp, I took car for a cruise and I have a decent drop across the rad. Top hose is around 185 coming out of radiator, lower hose is 150's. I will say that the thermometer isn't exactly the most accurate, it gives funny readings.

What I did notice was that there were a few areas on the radiator at the bottom driver's side mostly that were much cooler than the rest of the rad, like 60-70 degrees cooler. So I believe I have a compound issue that I didn't notice with my cool-running 318. It looks like a radiator upgrade is in my immediate future...

I did pull the timing back and I disconnected the vacuum advance so that part throttle cruising didn't have the added timing and that had no effect, so I don't believe I have a timing issue.