Hi,

I would suggest HAMB forum, they have a dedicated COE thread where there is a lot of COE on mostly dually frames/chassis.

I don't know if you noticed but the 2-ton 55-57 LCF is narrower over the front fenders (80") than the 2 1/2 ton (84"), so the front fenders are different. On the 58-59 they use the same fenders on both the 2-ton and 2 1/2-ton 86", since the front axle of a 2-ton is narrower than a 2 1/2-ton it makes the front wheels of the 2-ton sit further in and it looks to be frank a little bit funny. You can take a look at my LCF and you can see how far in the front wheels sits http://i185.photobucket.com/albums/x150/CrustyNut/1959%20Chevy%20Viking/DSC07129.jpg. Here is how it looks on a 2 1/2ton http://www.hankstruckpictures.com/pix/trucks/pnwtm/2004/dsc_7621.jpg.

Hence if you intend to use a 58/59 then use a donor that has a threading width of around 70-72" (the 2-ton is only, 64"). The duel mean thread is the same for both of them 69".

The frame rails sits 34" apart and I think it would be a lot easier to use a frame that is about the same.

I would start digging on http://www.gmheritagecenter.com/gm-heritage-archive/vehicle-information-kits.html to see what donor is suitable. They have the details up to 2000.

The rear axle swap should not be to hard, but up front only the medium duty Chevy trucks still have an I-beam. So I think it might be easier to put the LCF cab and front clip on a modern frame. I'm not a total idiot to frame alteration, I crafter a Jag IFS and IRS to a 58 Suburban, utilizing the Jag original rubber mounts -- see: http://www.jalopyjournal.com/forum/showthread.php?t=580652

One pet peeve of mine is that a LCF (or BigBolt in general) on a modern chassis, with small wheels look duck ugly. It looks like a toy, a BigBolt should have big 20" or 22.5" wheels filling up those big wheel houses. There is however adapters so you can put real 22.5" 10bolt big rig wheels on a pickup chassis.

If you go medium duty there is the Kodiak and Topkick that most likely are excellent candidates. smile It's one thing to give a Ford a nice heart from a Chevy, it makes it tick, but the other way around maybe the LCF will go into cardiac arrest wink..

Cheers Dyna