Re: Blocked off valve cover
If you want to run an open air cleaner in the summer, you can replace the pcv intake hose with a small breather on the valve cover or a breather filler cap. Most larger auto parts stores sell them. I run an open air cleaner with a chrome breather cap. I only have two vacuum hoses, one for PCV and one for vacuum advance. Really clean. 'Course, 1964 engine technology didn't have egr or air pumps or cats. The only reason that most racers don't use PCV is that they don't generally run enough vacuum to suck out all the excess vapors, so they run big breather elements. They also rebuild often enough and change the oil after every race so that the crud doesn't really shorten engine life much. In a street/offroad use engine, the PCV system sucks the vapors out of the engine and helps keep the oil free of dirt and especially moisture. Thats why engines with really bad blowby create 'mayo' in the oil. I had a Ford 2.8L ranger engine that had 220,000 miles on it and had so much blowby when it was cold that the PCV system actually blew instead of sucked.
1955 Willys CJ5 Buick 225 V6 160HP 270ft-lbs, T90 trans, Warn OD, PTO winch, Spicer 18 T Case, RS9000's, Dana 25F/ 44R,
5.38:1 gears, 11" brakes, Bestop Supertop, Hurculiner