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Old 07-31-2007, 10:42 PM   #1
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1974 20' Argosy 20
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Argosy's with 350 engines

How many Argosy MH owners out there have rigs that came from the factory with 350 engines?

I'm asking because I have a LOT of questions on the 350 configuration

Thanks,

Brad
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Old 08-06-2007, 08:50 AM   #2
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Argosy 350 engine

I have a 1975 Argosy 20 MH with original 350 engine.
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Old 08-06-2007, 09:12 PM   #3
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Quote:
Originally Posted by 911rs
I have a 1975 Argosy 20 MH with original 350 engine.
Doesn't sound like there are to many 350 Argosy's out there.

Since this moho didn't have the engine installation completed I was looking for some help on the 350 configuration. When we first got the 20' Argosy we were figuring on keeping the freshly rebuilt 350 the PO installed but based on how we plan on using the Argosy we'll likely pull the 350 and put in a fresh 454. The moho originally came with a 454 so I would think if we were to stay with the 350 we would need to at a minimum replace the front springs with ones having a softer spring rate due to the lighter engine.

We plan on using it as a tow vehicle for our 31' trailer so a heftier engine should make a big difference.

So now I guess I'm not to worried about how the 350s were installed, now I'm going to need help figuring out the 454 installation

Thanks!

Brad
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Old 08-06-2007, 09:20 PM   #4
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Hi Brad,

Pay particular attention to the motor mounts and drive train length. When I was a mechanic, we switched from a 350 to a 366 big-block truck engine in a gin-pole truck. The big-block required moving the front frame mount to a second set of holes in the frame and having the drive shaft shortened. Don’t know how this might affect motor homes, but was a lot of trouble in our case. On the bright side, the 366 never blew up. Of course it might have been because I insisted on install a tach and discovered that the engines were turning 4,600 rpm @ 70 mph and other drivers had been driving them 95 to 105 for extended periods. After tach installation, everyone slowed down.

Vaughan
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Old 08-06-2007, 09:26 PM   #5
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Plus, if we put a 454 back in it, we don't have to go to all the time and effort to remove the original 454 emblems on the sides!

Susan
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Old 08-07-2007, 09:42 AM   #6
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I originally thought of buying one of these with the 454. But after driving one with a stock 350 I saw the potential. So after upgrades of Mallory,MSD and Accel ignition components, Headers,K&N ducted to in front of radiator for cool air. US gear overdrive installation this weekend. Last upgrade will be Edelbrock performer manifold and carb. With these modifications I wonder how HP and Torque would compare to a stock 454? Better MPG. 4 bolt main 350 truck engines are very durable engines. If the coach was bigger than 20 foot the 454 would be king.
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