a hose from the intake to the valve cover is an undesireable duplication of the one from the air cleaner to the valve cover .... having full engine vacuum to the valve cover is effectively a giant vacuum leak, and it's not going to scavenge the fumes from the crankcase .... you should really read the shop manual link I gave above carefully and understand how the system works .... the one hose you should leave is the one from the valve cover to the air cleaner - along with the vented oil filler cap, that will collect any fumes from the top end, you still need a proper venting of the crankcase
Bill
