I have a 261 engine,which is S.C.O.,(no oil filter). The draft tube is plumbed exactly the same way,(from the factory),as Deve plumbed his. I have no problems with blow-by,so I'm not leaking any oil. It doesn't even smoke,when warmed-up.The hydrovac,and 2-speed lines,are connected to the same port,also. Have no problems with either one. Electric wipers,so no problem there,either. What intrigues me is "This set-up is much better for your engine,and will extend the life of it." Anything that will benefit my engine,I'm game for! Installation looks easy,and fairly inexpensive. any more info.,on the benefits,over the stock configuration? Is 52 Carl's theory,(sounds like it),even more efficient? THANKS, DEVE,and CARL!!