Few questions on radiator tube size

My biggest concern is i dont want to over cool the engine. Before i installed a fan clutch with a fixed fan i rarely saw over 180-185. With the clutch fan setup it stays between 190-195


There is no such thing as “over cooling” an engine. That’s what the thermostat is for. It controls minimum operating temperature.

You are much better off with the best radiator you can fit in there and let the thermostat do what it’s designed to do rather than skimp on a radiator and fight cooling issues.

With that said, 1.25 tubes all day long and twice on Sunday. Do not skimp there. Find a way to make the rest of it fit.