I have a stock 96 502efi with the oil cooler that has both oil and power steering lines running through it.

Does anyone know what the thread size is of the oil lines that connect to it ?

i have a 94mpi 502 mag.as far as i know this cooler is stock.the oil line size is 1/2nps,thats national pipe size.the power sterring line is a barb fitting made onto the cooler.that size is 3/8 hose barb

thanks. I need to pressure check it and needed to know what size pipe plug to buy.