Overheating

IMHO a bit over half isn't bad. Back in the mid '70's I had a used '71 Scamp with a 225 cid \6. No matter what I did I couldn't get any heat. Replaced everything including rad, pump, heater core, thermostat, (many times) and all hoses. I also restricted the bypass hose. The engine ran so cold that the breather cap would plug up with frozen blowby condensation in winter and cause the engine to stall at idle.
I'd be happy with what you have but do adjust your valves and timing to be sure.