NM51,
Those reasons all sound very worthwhile to me. Maybe a PCV valve will be an addition to my old truck. I had my first 235 in 1963 and it was hot rodded to the gills...the neatest thing about it was the two giant Offenhauser aluminum breathers mounted to the valve cover. I see these on E-bay as "retro" or "rat-rod" items and the going price makes me wish I had stock in Offy!

Stuart.