6335 (6336 is the lower one), but fairly hard to see in this pic:
http://www.vanpeltsales.com/FH_web/F...m_1940to48.JPG
It can be easy to get out or it can be close to impossible without removeng crank...it depends on what sealer was used when it went in. Sealer is necessary to stop oil from finding its way out around the back. Everything is cut to a circular arc, so it can slither out smoothly if the sealer lets go. Try lots of spray carb cleaner if stuck!