Stop in for a cup of coffee

Old man ray said

Most likely engine will never reach operating temp. If it boiling hot out and your pushing the car, then yep stat is best left in.

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I had a super cooling radiator built for the dart. 3 rows, 55 tubes per row. Wide as will fit, 22 inches. Copper.....And a 6 blade fan, milodon hi flow pump...

Milodon 16251 Water Pump Mechanical For SB Mopar 273/318/340 Steel 1960-1969

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  • • Milodon’s exclusive high efficiency impeller design is installed into new GMB castings using heavy-duty bearings and large-diameter shafts. It is the impeller that makes the pump work so much better than a standard, stock design water pump.
    • Milodon water pumps are available in high-volume (steel or aluminum) and standard-volume versions Pumps are direct factory replacements with ORG.MFR hose connections and bosses.
    • These high-volume pumps have a balanced distribution design (equal flow to both sides of the engine block) and a high-efficiency impeller that increases coolant flow up to 30 percent over stock.
    • These features increase coolant pressure in the block to prevent hot spots and air pockets and improve coolant flow in the radiator.
    • A high-flow thermostat is recommended when using a high-volume pump.