Engine Oil Cooler Thread Spec - Radiator

[Hot Air]

Anyone know what thread spec is for the ports on radiator for the oil cooler? I'm seriously thinking about running tranny fluid through it. FWIW, I have a CAS aluminum radiator that has provisions for engine oil cooling only...there is no provisions for tranny cooler on this radiator.
Conrad

 

[pacecarta]

the oil cooler should be 1/2" invert flare