I ran a PCV on my old 216 with vacuum wipers and just a std fuel pump, no additional vacuum and it was serviceable for the several years I ran it that way. I rarely ventured out in the 49 if it was already raining but when caught out on a cruise the vacuum wipers had no trouble getting me home safely. I did a thread and review on it many moons ago, (2013 or so I believe). I tried Deve's way and ended up modifying the draft tube to position the PCV further away from the block as my old 216 had way too much blowby to mount the PCV directly in the block. The size of the PCV matters immensely as too big will rob too much vacuum from the wiper motor. I replaced the 216 with a 235 and will be installing the old PCV setup to the 235 once I clean it up and make it more presentable. Too many benefits to running a PCV IMHO.