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Click on image for the lowdown. 
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| | | Forums66 Topics128,015 Posts1,055,334 Members48,419 | | 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: Jul 2008 Posts: 28 New Guy | | New Guy Joined: Jul 2008 Posts: 28 | Getting ready to place another order with LMC for working on my 3100 Cowls. They sell a complete repair cowl or just the lower section. All that's rusted out is the lower section, but it appears by looking at others folks handywork, they are replacing the entire thing. I'm using a flanging tool to marry the panels together, so I'm wondering how it will look at the edges with a flanged connection. Any expert advice here? | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | I would suggest maybe a little exporatory surgery on one side since you know you are replacing at least a portion. What you may find when you open a side up is more damage than readily visible and if you waited at least you will know what to buy. In addition you may find one side better than the other you just won't know until you dig a little bit. | | | | | Joined: Jan 2008 Posts: 493 Shop Shark | | Shop Shark Joined: Jan 2008 Posts: 493 | I did just the lower part. I would suggest if it is an AD truck that you remove the panel for the fresh air heater and look at the back side of the cowl. http://rides.webshots.com/photo/2846271590103315458dzNulz | | | | | Joined: Sep 2007 Posts: 2,644 Shop Shark | | Shop Shark Joined: Sep 2007 Posts: 2,644 | Only replace as much as you need.
Listen to Brad. There's a LOT more work involved in a full side cowl replacement. The leaded seam has to be melted out and spotwelds drilled out then there's the spotwelds on the seam covered by the hood on the sides. After all that you have to fit the entire leading edge of the door to the replacement and finish the seam.
Trust me, if you can get by with just the bottoms do it.
Last edited by Czechman; 04/29/2010 11:26 PM.
| | | | | Joined: Jan 2010 Posts: 4,263 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 4,263 | I’m no expert but I did learn some lessons when I replaced the lower cowl on my 1950 3100
Like stated above, keep as much original metal on your truck as possible. The thickness of the repair panels I bought are off a little.
Hang your door before you final weld to check fitment.
| | | | | Joined: Jul 2008 Posts: 28 New Guy | | New Guy Joined: Jul 2008 Posts: 28 | Roger that Czechman. I was looking at your progress and that's where I got my idea, but if you say to stay small, I'm gonna just chop as little metal off as possible. Thanks for all the advice. | | |
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