Bob;
Good point about the K & N breather..... My car does the same thing.... 351-W,pcv on the passenger side and K & N on the drivers side valve cover,stock type valve covers,my car may or may not have a little blow-by,but after a hard run such as an open track,the K & N filter will have some
oil in it,when I park it,a few drops drip out the low side right on the second header pipe,when I start it up again,it smokes like hell for a minute or two,making people think the car is on fire........I have thought of an extension to the filler pipe that is staight up like seen on the 289 Comp Cobras,but hate to weld on my existing valve cover for fear of damaging it (aluminum finned Cobra covers),I think I'll try the lawn mower air filter trick first....
David