Ive made my self a custom catch can and so far ive just vented the rocker cover. Ime going to be doing the block soon. Ive brought myself the block plug and also the 2x 10an fitting bolts what screw into the back of the block. Ime wondering what is the breather and which is the drain back ? ? At the moment looking from the block from the back ime thinking the one nearest the catch can is for the breather and the one nearest the cam belt is the drain back. Is this correct ?

Thanks

 

Anyone ?