Andy, On a day I had a half hour to kill I went to a NAPA store and went thru their manual that had all the measurements and cross references. I looked at the gasket diameter & thickness,outside diameter, etc. and decided to try a K & N filter which matches the Purflux dimensions and seems to be of high quality. As others have mentioned, having a quality filter is particularly critical on the B28F engines because of the likelihood of a very small bit of debris getting into and clogging the rocker arm oiling port and ultimately trashing the cam. Woody Omaha, NE - not too far from Fargo but warmer. To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/