I understand why the road draft tube was discarded in favor of the pcv system. I also realize that in normal, everyday use when these trucks were new, the build up of blowby, acid, etc. had a detrimental effect on engine oil and internal components.
Today, most of these trucks live pampered lives, never operating in severe conditions, using modern detergent oils, driving only a few thousand miles a year, and receiving oil and filter changes regularly. Is there any real benefit to the 216/235 engine that will be gained by converting to a pcv system from a road draft tube?
