Get a piece of rubber hose that will fits the breather filter box,find a piece of steel pipe that fits in the rubber hose,you will need to put a bend in the smaller steel pipe,do the same again from the engine block side find a piece of rubber hose to fit the block breather outlet and then a short piece of steel pipe to fit in that rubber hose,cut everything to length and weld the two steel pipes together,hope that makes sense