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Old 07-22-2015, 12:18 PM   #15
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1975 20' Argosy 20
Chestfield , Kent
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There are two VINS....

The Airstream,



And the GM

For example my MH VIN are

M20D5V5209
M = Motorhome
20 = 20’
D = Double
5 = Model year (1975)
V = Versailles, Ohio (production facility)
5209 = Production number

CPY375V306967
C = Chevrolet
P = Forward control
Y = 350 in motor
3 = 1Ton
7 = Forward control RV
5 = Model year (1975)
V = Assembly site (G.M. Truck, Pontiac)
306967 = Sequential number
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Old 07-22-2015, 01:24 PM   #16
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1976 28' Argosy 28
Chambly , Quebec
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Thanks for the precisions. My mistake, I was not clear (sorry, I am french speaking).The MH VIN is fine since my MH is a 1975, 28 foot, 2 twins which matches the: M28T6...On the other hand, the chassis reads: CPY3763310083 which would mean there is a 350 motor in it. Do I have a 28 footer with a 350 or do I have a 454 with the wrong VIN? I'm burning with desire to find out but I am at work.
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Old 07-22-2015, 01:51 PM   #17
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Hi Dan, I understand your point....I had always assumed it just means the chassis left the production line with the 350. There were definitely modifications made during assembly at Airstream.
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Old 07-23-2015, 08:57 AM   #18
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1974 20' Argosy 20
Richmond , Kentucky
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Dan,

My 74 vin is CPL374V316485 with the L indicating that it has a 454 in it.

Does your Argosy have the 454 badges on the lower front fenders? My 74 came from the factory with a 454 and has the Airstream applied badges. I've seen a few other 74-76 Argosies with the 454 badges as well.

You can just make out the 454 badge in the picture below.
Click image for larger version

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Brad
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Old 07-24-2015, 08:20 PM   #19
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1976 28' Argosy 28
Chambly , Quebec
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Hi Brad,
I do have the 454 badges, I measured the engine (since I'm not that familiar with big american engines and I don't have the ability to recognize a 454 just by looking at it) and it matches a 454's. Now I am out of topic but I don't understand my VIN which has 2 anomalies: CPY3763310083.
The ''Y'' should be a ''L'' and
the ''3'' should be a letter???
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Old 07-24-2015, 11:39 PM   #20
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1986 34.5' Airstream 345
Hebron , Illinois
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Hello The exhaust ports will tell you Big block or small block GOOGLE images 454 exhaust manifold gasket.
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Old 07-25-2015, 05:57 AM   #21
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1975 20' Argosy 20
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It seems the VINs in these units are not always expected. For example after I bought mine, and tried to register, we found the VIN was recorded incorrectly on the RMV data base and I had to bring it from Florida to Massachusetts to be inspected (basically have the RMV actually look at the stamped VIN) before they would issue the title and registration.
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Old 07-25-2015, 06:49 AM   #22
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1974 20' Argosy 20
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Quote:
Originally Posted by DanKlein View Post
Hi Brad,
I do have the 454 badges, I measured the engine (since I'm not that familiar with big american engines and I don't have the ability to recognize a 454 just by looking at it) and it matches a 454's. Now I am out of topic but I don't understand my VIN which has 2 anomalies: CPY3763310083.
The ''Y'' should be a ''L'' and
the ''3'' should be a letter???
The 3 indicates it was fabricated in Detroit.

Here's a vin decoder for 76 GM vehicles.

vincard76.pdf

Since yours has the 454 badges my guess is the 350 was changed out for the 454 either by GM before shipping the chassis to Airstream or else Airstream changed it out once the go the chassis. I'm betting it was swapped by Airstream due to the fact you have the 454 badges. I would be surprised if a previous owner would go to the effort of adding the badges when he did a swap from the 350 to the 454. The badges would seem to be a factory touch.

Unfortunately you'll probably never know when the swap occurred. Now you're down to just one anomaly!

Brad
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Old 07-25-2015, 12:11 PM   #23
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1976 28' Argosy 28
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Thanks Brad,

Your decoder has actually solved all anomalies. Indeed 3 = Detroit and for 1976, Y = 454.
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Old 07-25-2015, 01:37 PM   #24
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Quote:
Originally Posted by DanKlein View Post
Thanks Brad,

Your decoder has actually solved all anomalies. Indeed 3 = Detroit and for 1976, Y = 454.
Sure enough! I didn't even notice the Y on the chart. Gotta get stronger glasses
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Old 07-25-2015, 02:54 PM   #25
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Certainly shows why there was issues with my VIN because my 'Y' was registered as a 350 in 1975 and comes out as such if you put it in the online decode....this was what caused the issue with the RMV.
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Old 07-25-2015, 05:04 PM   #26
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Martin,

I'm not sure what your issue was. If I remember correctly your Argosy has a 350 and that's what the Y stands for. Why would the RMV have issue with that?

Here's the 75 decoder.

vincard75.pdf

Brad
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Old 07-25-2015, 07:37 PM   #27
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Tipp City , Ohio
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I suspect your MH came with 16.5" wheels and someone swapped them for the 19.5" wheels. When I first got my MH I did some research into upgrading to the 19.5" wheels, thinking it would help to reduce RPM's at highway speeds. Several sources led me to believe that the smaller MH's have smaller wheel wells than the larger ones that came with 19.5" wheel originally, and that I would have clearance problems. I would like to park side by side with a 325 and measure the wheel wells to confirm if there are any differences. I ended up buying 16.5" Firestone Transport tires. I have been very pleased with them.
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Old 07-26-2015, 10:02 AM   #28
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I currently am storing a 310 and also have my 20' Argosy. I think I'll take some time this next week and do some quick measuring to see if the wheel wells are different.

My first inclination is to say the fronts are probably the same but there could be a difference in back.

I'll report back.

Brad
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