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Mod | | | Forums66 Topics128,113 Posts1,056,279 Members48,439 | | 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!
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| | | | Joined: Jul 2022 Posts: 7 'Bolter | | 'Bolter Joined: Jul 2022 Posts: 7 | Hi I took my truck apart 20 years ago now reassembling need to know where all cross sills mount. I figured out front mounts to front panel back is on and I other one mounted with 2 bolts on each side panel 2 more cross sills how do the mount ro bed
Andys
| | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | Go to Mar-K’s website and find the diagrams of all the bed dimensions.
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: May 2015 Posts: 11,068 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: 11,068 | I would contact MAR-K (Toll Free 844-MAR-K844) and ask them for that information. I could give you the dimensions for a 1/2 ton, but that wouldn't help much. One of the intermediate cross sills on the 1/2 ton "floats" with the bed wood and is not bolted to the frame. I assume that's the same for at least one 3/4 ton cross sill. If you have the bed wood with mounting holes, that will give you the location of one of the intermediate cross sills. The other will line up with one of the sets of holes in the bed strips.
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: Nov 1995 Posts: 5,723 24601 | | 24601 Joined: Nov 1995 Posts: 5,723 | Welcome to our site, Andys!! I hope you find the info you need to keep your truck project going to completion. All we ask in return is that down the road someday, you share what you've learned. Today's newguy (to the site) is tomorrow's sage/guru/expert/teacher/etc.
Just a minor point but it might help you in your search -- The Advance Design pickups only came with one bed size (according to model):
3104 (1/2-Ton) -- 78 inches (inside length)
3604 (3/4-Ton) -- 87 inches (inside)
3804 (1-ton) -- 108 inches (inside)
So to call a 3/4-ton a "long bed" may lead one to believe there are also "short" beds available (and vice versa). There are not. 3/4-ton beds are not "long" other than that they are longer than 1/2-ton beds. They could also be "short" compared to 1-tons. But I belabor the point. Thus, any measurements for a different size truck will be inaccurate.
Concur -- the very nice and helpful folks at Mar-K will be your best info source on this. Or somebody with a 3/4-ton ...
Again, thanks for coming to our site -- hope you stay awhile!
John
~ John A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult. 1949 Chevrolet 3804In the Legacy Gallery | In the Gallery Forum1973 IH 1310 Dump1963 Kaiser M38A12001 International/AmTran RE3000 "Skoolie"2014 Ford E-350 4x4 (Quigley) | | | | | Joined: Jul 2022 Posts: 7 'Bolter | | 'Bolter Joined: Jul 2022 Posts: 7 | Thank you for that information I didn't know that
Andys
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