Tom,
I have had a pvc setup on my stroker since I had it built in 1996 and it is great. As Wilf said, no fumes or anything and it does help get rid of some pressure. Three people here who built cars have since put the pcv on as they were getting
oil fumes all over their engine compartments. Some smoke from just a breather is normal. The hot
oil builds soime pressure and it has to go somewhere. So far as your oval air cleaner, two of the guys just drilled holes in the bottom and put in a right angle plastic fitting for a hose from the left breather cap to the air cleaner. My pvc valve from the right valve cover goes to the port on the back of the carb mounting spacer.
Ron