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1957 350 Series
I think it's a 2 Ton...
I think the engine is a 270 ci.

Tag reads as follows:
Vin:353 c t 1014
Gross hp:140 @3600
Net hp: 127 @3400
Gross weight:16000
Combination weight:32000

Pic 1

Pic2

Good catch. Better get all we can before the tin worm does.

Can anyone please explain the following ?
- Im new to the Bog Bolts-

1.) What does 350 Series signify ?
2.) How can I tell what size (tonnage) truck I have (1 Ton, 2 ton, etc...) ?
3.) Does the 270 ci engine have any significance ? I'm familiar with the 235...but is the 270 Special ? Does it have any known problems ? Are parts hard to find for the 270 ?

Just trying to find out anything I can...
Thanks
Mike

Hy Mike Nelson, that is a very nice truck you have there, and a rare one, that grill and hood were only used for one year, so guard them with your life! Is that an ex firetruck? The 350 series designation gives us a point of reference to order parts, and to know how it was equipped when it left the factory, it also tells us what was optional from the factory. As to tonnage, I have never figured out how that works, and frankly I don't care, if you have to call it something call it a 3 ton. The 270 is a very good engine and it is a GMC engine, where the 216, 235, and 261 are Chevy engines. The GMC engine design was released for production in 1939, it is a full pressure lubed engine with no shims for clearance adjustment, unlike its Chevrolet cousins. Parts for the GMC engines are no harder to find than parts for any engine of the same vintage, in some cases easier, as these engines were used in military vehicles as well, and they have quite a following. According to the serial number you posted your truck should have a wheelbase of 155", what rear axle does the truck have, a single speed or a two speed? Hope that helps.

I love it!! Nice find...

The 350 series are rated as 2-ton trucks. The 300 series are 1-1/2 Ton. The 353 will signify the wheelbase. I believe it is 161". You can also find a lot of information at the oldgmctrucks.com website. Hope this helps.

Wow, that is nice! Congrats!

Thanks to everyone for the information, and to answer your question, it's a 2-speed diff that appears to have been sealed off with a piece of old tire rubber.

Thx

That is a nice looking truck you got there. Hopefully the rear end only needs a new shifter and it will work good for you. There is no explaining what previous owners do sometimes.

WOW!! I always loved the old gmc's. Amazing looking truck!

nice truck!

That is a cool-looking rig.