Vehicle running warm 360 la

Did you get the full 4 gallons of coolant back into the system when you refilled it after working on it?

Or did you only get 3 gallons in it and there is still air trapped in the block?

Air bleed thermostat:

View attachment 1716026781
Just drill an 1/8" hole like in pic. I will bled out air before t-stat opens. I put a new Stant t-stat in my hardtop when I 1st built it and it ran hot. Thought it might be radiator. Turns out it was a bad (new) t-stat.