Well off hand I cannot recall if the 904 has the plastic vent baffle like a 727. My point with the puke can is that even if you do not have any leakage out of the stock vent, there is no way to hook up a puke can at that location. NHRA wants there to be no way for fluid to leak out. John does not have a dedicated puke can video but he talks about how to hook one up in the video link that I posted.
