I'm getting a Baldwin Air Filter for my '77 308 from White Tuker out on N.Eldridge and 290 area (
www.whitetuker.com). It's part # PA2094. They order 6 at a time but will sell just one. $29.95+tax.
If anyone else in the Houston area wants one, PM me and I'll pick one up for you. They'll be here in about a week. Or, I'll just update this thread and you can get it yourself. You can order on the phone (800# on web site) and they will ship it to you out of towners.
I read a lot of info. on the 308's in the archives at the "other" site and the Baldwin seems to be the filter of choice. The consensus seemed to be that the K&N let in to much crap and the HP gain was suspect (confirmed by a Forza article) while the Balwin seemed to be a little more robust in filtering ability.
From reading other info the OEM from a dealer is closer to $100.