Here's some info that I found out about the Monaco 440 police air cleaner bodies.
Special thanks to
boduke:
Krisiesmopes Mopar Stuff: 1974 HP 440 Air Cleaner
nick:
Nick's Garage - Air Cleaner Identification
and mbmopar for the info on his air cleaner housing and cool info on Mopar cop cars in general, and bagman for his CEVS pics
Mopar air cleaner bodies did not have part numbers on them.
Mopar orange air cleaner body = high performance
Mopar orange dual snorkel air cleaner = high performance big block (not necessarily a cop car)
But on the Monaco, the only high performance engine was the 440 cop engine, so on a monaco, an orange dual snorkel air cleaner = cop car
In 1974, the OSAC (orifice spark advance control) was moved from the firewall to the air cleaner body. So a Monaco should show this on the air cleaner body. OSAC was on both USA & Canada cars.
See pic 1 and this reference:
Engine emissions systems - how they work and why
Pics 2,3,4 shows my narrow angle housing, with the OSAC behind the passenger side snorkel. Notice that the measurements listed in the pic do not include the flare. The driver side flare is missing. It must have fallen off (or got pulled off)
We have (2) known cases of a 1974 Monaco cop car with "narrow" angle cleaner:
a) the 1974 440 RCMP car from which mbmopar sourced his air cleaner. See links to his albums here:
http://www.bluesbrotherscentral.com/forum/bluesmobiles/8452-got-my-4d-6.html#post100274
He has much better pics of a narrow angle air cleaner housing.
b) my car (Marin County Sheriff car)
We have (2) known cases of a 1974 Monaco cop car with "wide" angle cleaner:
a) king-of-the-hill (RCMP- the VIN says it was built in Belvidere, IL - maybe all Monacos - even those destined for Canada - were built here)
b) buffalo collection (CHP-spec fire department car)
I don't know of any 1975+ Monaco cop cars, but from discussion with boduke:
Krisiesmopes Mopar Stuff: 1974 HP 440 Air Cleaner
the narrow-angle air cleaner is more rare than the wide-angle, and he's only seen the narrow angle on 1974 cars. 1975+ were all wide angle.
The 1974 and 1976 parts catalog lists the same PN for police air cleaner:
PN#3830036
Boduke isn't sure, but thinks that the narrow-angle is 3830036, and the wide angle is 3769020.
So the parts catalog says that a 1976 should use the same air cleaner as a 1974, and we think the parts catalog is referring to the narrow angle unit, but nobody knows of a 1975+ that used the narrow unit.
Maybe there was a technical service bulletin that recommended the changeover to the wide arms. Or maybe they ran out of stock, or some factories only had one style (although its strange that one RCMP = narrow, and another RCMP = wide). Buffalo Collection has the large 100 amp alternator & wide angle, but king-of-the-hill also had wide-angle, but with the smaller alternator, so that's not the difference.
I searched the web for 3830036 and 3769020, and the only useful hit I found had both on the same page (pic 5)
Chrysler Muscle Parts Interchange ... - Google Books
Its a google page shot of
Chrysler Muscle Parts Interchange Manual, 1968-1974 by Paul Herd
It shows
3830036 as being for 74 Dodge 440 police car.
and
3769020 as being for 74 Dodge civilian 440 and that POLICE MODEL WILL NOT FIT
But "will not fit" seems strange. 1974 Cop cars came with either housing. Why couldn't a civilian car use either housing?
So the gist is:
1974 440 cop monaco = narrow or wide; don't know why one would have one over the other
1975+ 440 cop monaco = ? Don't have any pics of engine compartments of a 1975+ 440 cop monaco, but nobody's ever seen a narrow angle orange dual snorkel in a 1975+ car. I'm guessing that 1975, at least, used the wide angle orange - with oval flare. I don't know if 1976+ used a wide angle orange with no air duct, or if it used a special housing with an air duct on the driver side.
In this post:
http://www.bluesbrotherscentral.com/forum/bluesmobiles/7480-bluesmobile-reunion-2010-a-18.html#post115170
Bagman references his CEVS album that has some pics with the caption:
> Monaco that was a restored to a real police car with a 440
(pics 6 and 7) and they shows a black air cleaner with an air duct on the driver side. But I think this is a b-body Monaco (based on what's going on in the engine compartment, such as the shape of the windshield washer reservoir, angle of the battery tray, and cowl area under the wiper arms).
e-bay currently has a 1977 b-body Monaco for sale - an actual police 440, not a replica, and it shows an orange dual snorkel (pic 8 )
Dodge: eBay Motors (item 230517811873 end time Sep-04-10 02:35:35 PDT)
but it looks in rougher shape than the CEVS monaco. Maybe it is a true police car, but that doesn't mean that the air cleaner housing is correct.
Nick has a lot of good air cleaner info:
Nick's Garage - Air Cleaner Identification
He sent pic 9 of an air cleaner from a "440 full size cop car", but he doesn't know the year.
So my guess for 1976+ is that a 440 cop Monaco would have an air cleaner housing like that shown in pic 8 or 9.
And I'd guess wide-angle for 1975.
For bluesmobile (1974) purposes, it seems either a narrow or wide angle orange dual snorkel are fine.
I tried to summarize all the tidbits I learned here. We may never know why a 74 would have one cleaner housing over the other, or why nobody's seen the narrow angle after 74, but who knows! Please add/correct as possible.
your friend in clean air,
arthur
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