Trans Cooler

[Camaro67antwerp]

Does anyone know what size and thread the connection between the automatic transmission and the cooler has? I have a 327 with powerglide transmission. I bought a new cooler and the connections fit but there is no "bottom" in the holes so the pipe is still loose so i am looking for some kind of adapter like npt to screw into the cooler and the right hole in the other end for my oil pipe.