Running without a thermostat ok?

Just ordered a lower hose from NAPA and the spring from PonyParts (8.99 shipping included).

When I swapped motors last June, I took the original radiator to an old school radiator shop. Since it was so old, he didn't want to rod it out, but he ran it through his tank. Not sure if it was a boil out or ultrasonic. Said it was flowing well.

The FSM I have calls for a 180* stat so I run that. I also found an original shroud and put that on. It's a 273 Commando in a 66 Barracuda. Original A/C car so it has the HD radiator.

It normally runs 180-185 when driving, up to 195 in stop and go traffic. When I shut the motor off on a hot day it will climb to just over 200 but as soon as you start the motor is goes back down.

I always worry about these old girls overheating so I keep it flushed and a good 50/50 mix of antifreeze.