Radiator to trans cooler line fittings

I'm not sure what the radiator is out of? 78 aspen 318 car is my best bet. New cooler lines from inline tube. Can someone tell me which fittings I need to make the connection? Best guesses are also welcome!
Thanks

Mopar uses 5/16" lines. Go to a NAPA dealer and buy a 25 foot steel line and the end fittings. Go on Summit Racing and for about $50 you can get a high quality tuning bender, It won't crimp the line. Also buy a high quality double flare too. I recommend quality tools every time.