The 3800 frame is quite a bit different than the 1/2 and 3/4 ton counterparts.
The front of the 3800 frame is 1/2" narrower than the others. This is because it had 2" springs vs. 1.75 springs.
The rear of the frame essentially, is the same as the 3/4 ton, with the exception that it doesn't have the kickup above the rear axle. It's straight.
The frame itself is quite a bit more susbstancial also. It is taller in key areas and the metal is sligtly thicker.
I bought a 54 3800 a couple years ago as a parts truck. I was surprised at how beefy the frame was in comparison to my 3600.
At times I wish I hadn't gotten rid of it.
If I were ever going to do a Hot Rod or high horsepower build. I wouldn't think twice about the 3800 frame. I honestly think it is heavier duty than alot of trucks that came after it.
