Fellow Geeks,
Some specific info about this subject can be found here:
see below
Open the Document,
Select chapter 4, when it opens, go to page 183. It will answer your questions about distributor venting.
I'm not sure how to cut info from a PDF document or I would have done it and just posted it here for you guys.
Steve
another try:
http://www1.airweb.faa.gov/Regulator...0?OpenDocument