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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!
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| | | | Joined: Oct 2010 Posts: 202 'Bolter | | 'Bolter Joined: Oct 2010 Posts: 202 | I have been searching around for information on the quantity of cross sills a 1951 3100 needs. I am ready to order parts. American Classic Truck Parts a front, center and rear sills. It seems to me there needs to be a cross sill before and behind the frame rise over the differential. Is there a web site that illustrates the assembly of the beds on these pickup? Many thanks in advance Walt
Last edited by 54Belair; 06/23/2018 7:05 PM.
| | | | | Joined: Apr 2005 Posts: 7,441 Bolter | | Bolter Joined: Apr 2005 Posts: 7,441 | Mar-K has all the info you need plus they sell the parts. 
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: Jan 2017 Posts: 308 'Bolter | | 'Bolter Joined: Jan 2017 Posts: 308 | Walt--there were 4 on my 49. When you do the bed take it off and install upside down, otherwise you will have left over parts. I used ss and have extra bolts, nuts and washers.Bill | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | | | | | | Joined: Oct 2010 Posts: 202 'Bolter | | 'Bolter Joined: Oct 2010 Posts: 202 | Thanks for the info. I will buy another front cross sill. | | | | | Joined: May 2015 Posts: 11,125 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,125 | Thanks for the info. I will buy another front cross sill. Don't buy ANOTHER front cross sill. What you need are one front, two centers, and a rear. The two in the middle are identical, but the front and rear are unique.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Oct 2010 Posts: 202 'Bolter | | 'Bolter Joined: Oct 2010 Posts: 202 | My original question stems from a lack the holes for a cross sill before the frame hump. See link ---> http://www.woodlandsoftwaresolutions.com/additional_images/cross_sill_detail.jpgI don't remember how it came apart. The bed to frame bolt kit I bought includes 2 long bolt for the forward mount and 6 bolt for everything from there on back. Its a little confusing. From the "center" cross sill to "front" cross sill (pointed to by the green arrows) seems like a long way to span 3/4" thick wood planks and have it carry 1/2 ton. | | | | | Joined: Apr 2005 Posts: 7,441 Bolter | | Bolter Joined: Apr 2005 Posts: 7,441 | As suggested above, look at Mar-K’s website. Diagrams and specifications are shown there. They know everything there is to know about a 1/2 ton bed.ðŸ›
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: Dec 2005 Posts: 406 Shop Shark | | Shop Shark Joined: Dec 2005 Posts: 406 | The second cross sill is aligned with the third hole back in the angle strips/bed strips. It just does not have a bed to frame bolt through it. It sits on the frame but is not bolted to the frame at that point. Look again at the photos of Brad Allen's beautiful truck. Also note the wear pattern on your frame at that spot. That is where the second cross sill goes.
Mar-Ktech | | | | | Joined: Jan 2010 Posts: 4,263 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 4,263 | | | | | | Joined: Oct 2010 Posts: 202 'Bolter | | 'Bolter Joined: Oct 2010 Posts: 202 | Okay. I get it now. The bed side is actually supporting the bed floor in that area. Thanks for the input. I will need another cross sill.
Brad Allen's photo "Bed19"
Last edited by 54Belair; 07/04/2018 12:38 AM.
| | | | | Joined: Mar 2024 Posts: 2 Moderated | | Moderated Joined: Mar 2024 Posts: 2 | Great Tribute to Dad! He's Smiling  | | |
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