Classic industries radiator finally gave out

Radiator showed up today, looks great, got it mocked up in the car, needs a little adjustment here and there but not too bad, one thing i wanted to ask is how much clearance should be between the fan clutch and radiator core? Right now without the radiator being tightened to the core support i have roughly 7/16” between the fan clutch and core, im thinking when its tightened up it might open up to 1/2” of clearance, is this enough?