can a '67 440 Chrysler "300" have an AVS? UPDATE!

Such as a very late model year build? I was not dressed to do any numbers checking/digging but I did see the AVS air door when he pulled the air cleaner to prime it. Thank you for your time

It's a Mopar, never say never.

R.

Alright

i don't think so. the avs was a smog era carb and model year 1967 didn't have to meet those standards. all the '67 440's I know of had afb's. there were some 440's with small holleys but i'm not sure which year they were.

67 was AFB only, If it had an AVS it was almost certainly swapped. Sure, never say never, but in this case I'll say it until someone can prove otherwise without any doubt.

.02

Just check the number stamped on the base, or if it has a tag under the lid bolt. That will tell everything

The guy says he "knows" it is a 440 & it has at first glance that grungy "original/untouched" look as does the AVS & it has a yellow vac cap on the bowl vent for the hose to the charcoal canister that a 68 car would have. I will check numbers the next time I get over there but the guy says he really doesn't want to come off of it (I may have to put some hundreds in my pocket!). & it is a 2 dr. Thanks guys.

Vacuum cap? No way

1970 first year for that, IIRC. 2¢

Robert

Oh OK '70 is the first year for the canister? Yeah I gotta get some numbers. Yes the vac cap has been added. It ran (barely).

After all those years, carb went bad and replaced it with a newer one, simple. In 68 years I have a few things replaced on me too.

But an AVS doesn't fit where an AFB has been

at first glance the only thing that looked off was the AVS (with the bright yellow vac cap!) & if I am reading the responses right that a 67 car (even a late build) could (should?) not have an AVS (which AFAIK is a 68 to mid 71 emissions carb) then all that is left is for me to go back over there in my grubbies & do some digging & get some numbers. (eng number/letter on machined pad by dist/carb #) Thanks guys.

Morty are you saying an AVS will not bolt on an OE AFB manifold?

I thought the AFB had a smaller bolt pattern. I have only owned 1 AFB 4 barrel intake and it looks way smaller to me than the AVS manifolds I have

there's small bolt pattern afb's and large pattern. isn't a '67 magnum intake the same as a '68? were the '66 and down intakes used in '67?

it did not have the good HP ex manifolds (so its a 350 horse I am assuming) if that helps.

I don't know about a 67, but according to the 68 fsm and also this rebuild kit instruction sheet say an AVS was used in 68 on 383's and 440's.

I'll have to go with what Mr. Smith said,no exception !!

After all the love I got on this one, I will get over there when I can.

Just to toss out a complete guess, if it's an AVS I'd bet short odds that it's a 4966s which was a very commonly used as a "one size fits all" replacement.

67 and 68 manifolds where the same casting number. There was a discussion on this in another post awhile back. Some AFBs had dual bolt patterns

All 67s 440s used large bolt pattern, 350 used a Holley, 375 used large bolt pattern AFB.

No no no.

That's a 71 440HP carb

GG says so

Correct! All 440 engine 67-69 model years used the 2806178 intake manifold. Wide bolt pattern. We are talking M code 440 Cudas to grandmas town and county station wagon, to Mr. Drysdales Imperial convertible. Same intake manifold guys.

1966 and older RB intakes were narrow pattern, all 1967 and older 383's were narrow pattern.

So Morty the 1967 440 is the only AFB car that can take an AVS on the same intake.

Yes it can have an AVS but Chrysler didn't put it there. The 67 300 440 LP 350 horse engine came with a Holley and not very reliable. No surprise it was replaced with an AVS which is more common and with the air door adjustment its very easy to get them to run good.

I've never seen a 1967 car with an AVS from th factory. Look
at the parts book and shop manual, no AVS in there either.

The air cleaner base would have the large hole for AVS instead of small hole for AFB. But you can get the base or the entire air cleaner form the car that donated the AVS. Choke thermostat is different also. Fuel line the same.

Cool - learned something today

.....Yes,yes,yes, , and it was commonly used as a one size fits all replacement, most I see are dated post 71 production, dated 1972,3,4, etc.

yep - it's a parts carb

And thank God there are so many out there, the pile I have hoarded up have saved many a rare list # carbs sorely needing parts.

the intake # is 2606178 & the date is 1-25-67. the AVS # is 4966 S CM23 on the drivers side inner fender bolt on tag

Scott nailed it.


Tim

Chevy used an AVS in 1966 on their 327 275 HP engines, number 4028SA

Didn't he though! The AC compressor was covering the pad I wanted to get a letter off of, but the eng sure does look OE/untouched.

There's a zillion 4966S carbs floating around. One thing, they use a different diameter accelerator pump so one has to be careful to get the right kit.

R.

Dog after seeing him today I dont think it will change hands but I will keep the AP difference in mind cuz I did get jammed up over that once on a prior build (had to end up buying 2 kits).

Had my hands on one of those many years ago. A friend of mine had a '57 Chevy (283 two barrel). I found him the '66 intake and carb for $10. I rebuilt the carb for him. By the time he was done he had a four barrel on his car for about $30. He still couldn't beat my '66 Barracuda...