[schneidsd455]

HFR,
What do you think a 74 formula base should go for? And do you have one for sale at that price?

Originally Posted by Held for Ransom

It's nice looking because it's not a Trans Am base (always ask yourself why is there no lid). The crankcase vent tube won't work unless they use/have a non-TA unit. Still too much money, IMO.

[Held for Ransom]

Restorable one (no metalwork, just paint strip and reshoot) with the lid, $150-200. No extras at this time. I do have a couple beat up '74 Trans Am/GTO bases with lids.

['ol Pinion head]

Originally Posted by rexs73gto

I have a question about the air cleaner bases to. I have a base that I think it cake from a T/A but not sure. I've had it for a LONG time. It is the typical 16" base with a single snout. The end of the snout is about 3 1/2 inches wide on the end & it has 4 of the vac. hose clips , with the indentation on the side of it (where the dist sits) Has a place for 2 sensors on the inside of the base, 1 is for a sensor with a single hole post, & then 1 with 2 posts , both would come through the base for vac. lines to be attached. Also has the 1/2 or so hole for where the air port on the top of the cabs would come through it. Can anyone tell me what this base should fit. The smaller snout end is what is confusing me. As i said I've had this for a long time & am not sure about it. Any help ?????

Rex, looked at your pics then looked at several bases I have. Your base is from one of the '79 model 301W (4bbl) aircleaners. '79 Pontiac (gasoline) models received the last of the 14" diam aircleaners, only diesels continued on after '79 with 14" diam aircleaners. Your '79 base will measure 16 1/2" across the top of the beaded edge. '80 model T/A's went to a base that was 15 3/16" across the top, & took the smaller diam AC 329C aircleaner. The small snorkel shaped like the one in your pics with the little slots towards the edge was def used on the '79 301 aircleaners. The crankcase vent pipe location is correct for a '79 301 Pontiac & the flat spot in the rear dome of the aircleaner was present in both '79 301 4bbl aircleaners & in the 2bbl version that was stamped for that year. Whether the base originally came from a '79 301 W Bird (with or w/o the T/A lid) or from a '79 301W A-B-G series, can not tell from your pics.

[rexs73gto]

Is there a different shot that I can take to give you a better idea of what you need to see which one it is ????

[2manyT/A'S]

Originally Posted by 'ol Pinion head

Rex, looked at your pics then looked at several bases I have. Your base is from one of the '79 model 301W (4bbl) aircleaners. '79 Pontiac (gasoline) models received the last of the 14" diam aircleaners, only diesels continued on after '79 with 14" diam aircleaners. Your '79 base will measure 16 1/2" across the top of the beaded edge. '80 model T/A's went to a base that was 15 3/16" across the top, & took the smaller diam AC 329C aircleaner. The small snorkel shaped like the one in your pics with the little slots towards the edge was def used on the '79 301 aircleaners. The crankcase vent pipe location is correct for a '79 301 Pontiac & the flat spot in the rear dome of the aircleaner was present in both '79 301 4bbl aircleaners & in the 2bbl version that was stamped for that year. Whether the base originally came from a '79 301 W Bird (with or w/o the T/A lid) or from a '79 301W A-B-G series, can not tell from your pics.

I have an airfilter housing that came off a 79 301 I had about 20 years ago and am pretty sure the carb hole is offset,like the 403 olds.......this changed in 1980,as I recall.....the 301 4bbl. intake was revised.....so the one in question maybe from an 80 301.

[unruhjonny]

my knee-jerk reaction to that mystery airclaner was something akin to maybe a '70 GP air cleaner;
the lack of a carb fuel bowl vet tube is definately screwing me up, ditto the fact that it doesn't look like it has a big dropped base...
i guess it could be something circa 1979, but (correct me if I'm wrong here) wasn't there something to do with emmissions or engine noise thag required all post-1972 air cleaners to hook up to a flexible duct, then a feed point far from the cabin?

[rexs73gto]

If this helps I do remember when I took all the parts off of it the hole close to the snout had a plastic & brass vac. fitting that went in at that spot. The brass part went on the inside of the air cleaner. Thats the onlt thing I can remember about the base itself.

[Baron Von Zeppelin]

The Boss had a real nice low mileage all original 79 301 Formula a while back.
Maybe his For Sale listing had an engine shot.
Or maybe he could drop a picture on us.

That air inlet spout does seem a little out of tune for a late 70's Pontiac

I have a 77 301 Catalina Wagon sitting outside i can look at breather tomorrow.

[The Boss]

This is all I've got for you....

['ol Pinion head]

a few notes...
Rex's aircleaner is not a '70 base 4 bbl Pontiac air cleaner, the snorkels on those are quite a bit shorter & the base itself is different. Have a few in the racks & have pulled many dozen '70-72 455 big car engines over the years. Usually tossed most of their aircleaners, very little value.

The '79 301 aircleaners have the inlet snout exactly like the one pictured above on Rex's aircleaner. The end of the snout has the small slots stamped in it. Both the F body versions & the A-B-G series 301W version use a small diameter fabric type duct (just like in Chris's pics). The rear of the domed area, directly behind the Q-jet, also has the flat area, my '80 301 F body bases don't have that.

For 1980 models, the Pontiac 301 Firebird engines used 3 different aircleaners. The 301 turbo & the 170 horse 301 used versions of a new wide mouth snorkel aircleaner. I have always bought the '80 301 turbo version with the heavily angled down snorkel. Up into the mid 90's, these were relatively hard to come up with & they are different than the '81 version. The base 150 horse 301W '80 Bird aircleaner used a small snout version, but I believe it used a AC329 filter. Such a filter would fit in a 15 3/16" diameter base. Rex, when you lay a tape measure across the beaded edge of the top of the base, does it measure 16.5" or 15 3/16"? That's prob easier than looking for a 14" & 12.5" diam aircleaner filter to drop in...

[Baron Von Zeppelin]

oPh - shouldn't it have the distributor indention at rear if its a 2nd Gen Bird breather ?

My 77 Catalina 301 2bbl has the snout like you described with 2 slots in the end.
And a fabric type hose slips right onto snorkel.
Just ike Boss's picture.

Have another (unknown) one just like Rex's (4bbl) but no slots on the end of snorkel - and it still has the adapter installed into snout that takes it to the larger round air intake hose size. (4 to 5" diameter approx)

Have a 403 TA pan - offset - not as deep of drop as 400 pans - but has the distributor indentation. No slots in end of snout - had an adapter.

Also found in stack - TA type drop base - indented for distributor -NO SNORKELS AT ALL
wtf lol
seems like someone told me what its application was a while back - or read it on here maybe - but already forgot.
Early 2nd Gen Camaro with Cowl Induction ?
70.5 TA with L85 option ?

[Held for Ransom]

Well, I thought I'd update this thread.
Visited my old '73 Trans Am and had a look at the air cleaner as the current owner is upgrading to a more potent power plant.
It was built after the mid-March emissions change.
Hopefully one can see that the hose clips have holders on both sides instead of just one side.

[SD73]

Interesting. I wonder if those clips were just from a different supplier of the same part? I've seen some pre-73s with the later style clips. I haven't seen enough of other '73s to see if those clips were always used. Have you seen these exclusively or multiple styles for '73?

[Held for Ransom]

When Id'ing Ram Air air cleaners, I noticed the double line on the '73s. But, never locked down when they were used (and they're a different style).
https://forums.maxperformanceinc.com...d.php?t=872998