Quote:
Originally Posted by poncho-mike
I need one 455HO air cleaner for my 1972 455HO convertible.
I'm trying to determine if the 455HO air cleaner is a 1971 or 1972. I thought there was a difference between 1971 and 1972, but I don't remember what it is.
I'm not sure what you're asking "No tag or even glue residue on the sides of base?" The no 1 air cleaner has a piece of tape covering the two holes at the back. I'm not sure why it's there. I think that one either hasn't been run, or has been cleaned up before I got it.
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The difference was studs (1971) vs no studs (later in '72) on the diaphragm hold down.
If you have no tag or residue, it's been restored or an over-the-counter replacement. The scalloped hold down didn't show up until the '77 Pontiac air cleaner.