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[do I put a hose from the bottom of the breather box to the air cleaner so > it can draw vapors in like a '71 engine? will this work? You would have to remove the nipple assy. first and gut it. There's a valve there which requires some vacuum to pull air thru. Simply connecting that valve to the air cleaner will let pressure build up in the case and result in oil blowing out around the fan hub.] Got it..........I remember seeing crankcase vent pipes on old chevys, which just let crankcase vapors exit into the atmosphere. The only thing that pushed out these fumes was "blow by"........ so, on a 68-71 t3.....the black crankcase box was just a way to stop actual motor oil from being exited out the hose........VW just hooked the black box to the air cleaner so any fumes would get burnt.......(instead of letting this hose go to atmosphere)......correct? So, given my engine situation......my easiest way thing for me to do is gut out the nipple on the outlet pipe of my black box, then run a hose from here to the air cleaner...this way, I'll have a very similar crankcase vent system to a 68-71........correct?? another thing, why the plastic caps on top of these black boxes? inspection?? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~