Click on image for the lowdown. 
====
| | | Forums66 Topics128,020 Posts1,055,345 Members48,420 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Dec 2007 Posts: 140 'Bolter | | 'Bolter Joined: Dec 2007 Posts: 140 | I took a GMC 270 out of a 1951 Chevy COE and it appears to have the GMC intake/exhaust setup. I've tried to identify the exhaust manifold # but can't find it (or even one similar) anywhere. Typically I can at least find a part # on gmpartswiki but even wildcard searches come up empty. 2090603 is my best guess at the exhaust casting #. Curious if anyone else has run into this. I'd upload a picture, but I'm having trouble finding where / how. Thx for any help you can provide. Derek | | | | | Joined: Jan 2016 Posts: 631 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 631 | Google ........GMC 270..........then click images. 100 or photos will appear some will be 270 engine. While it will not give part # it will give an idea what others have.
Here is a Stock GMC 228 manifold which I think is a shared part with the 270 ?
[URL=http://s398.photobucket.com/user/showkey_bucket/media/image_zpse7mvvock.jpeg.html]Picture [/url]
Last edited by showkey; 08/03/2016 2:32 AM.
| | | | | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | Doesn't the COE use an updraft carb and a totally different exhaust manifold? Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2007 Posts: 140 'Bolter | | 'Bolter Joined: Dec 2007 Posts: 140 | Yeh it does use a completely unique setup so looking at typical downdrafts won't help | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | dhjmd, photo instructions for the site are posted in the bottom left of every page under "Image Posting Policy". Love them COE's.
Martin '62 Chevy C-10 Stepside Shortbed (Restomod in progress) '47 Chevy 3100 5 Window (long term project) ‘65 Chevy Biscayne (Emily) ‘39 Dodge Business Coupe (Clarence) “I fought the law and the law won" now I are a retired one! Support those brave men/women who stand the "Thin Blue Line"! Hug a cop! USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 |
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | You have an engine from a COE with the unique updraft manifold set and you seem to understand that.
What is the question? | | | | | Joined: Dec 2007 Posts: 140 'Bolter | | 'Bolter Joined: Dec 2007 Posts: 140 | Whether or not 2090603 is a legitimate part number | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Forging numbers and part numbers are seldom the same. Often the part number is one number off from the casting number.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | GMC parts books are a little hard to read, but if your COE is a model F350-24, it looks like the exhaust manifold should be #2193471 part number,(this is not necessarily the casting number).
If you PM me I can text you a picture of the parts book listing.
See the USA in your vintage Chevrolet! My Blog | | |
| |