I have a 3800, its a 53. My Husband has gotten the old Thing up to 60mph and I am laying on the horn to stop him. It is in your foot. My truck travels easily at 50mph with out winding it out to much. Fast enough for me in that thing! It has a 235 in it.
As far as parts, all BODY parts are interchangable. However brakes are not. Those are hard to find and you'll have to up grade to a newer system w/newer drums if your old ones are to bad off.
I am going to swap out the rear, just dunno to what exactly yet. Beings its a 8lug, you (and I) can only go to a 3/4T. Unless you switch out EVERYTHING to get to the 6 lug pattern. I am looking at a 70's or 80's 3/4T rear.
I havent had TOO much trouble with parts and such for mine. Mostly restoration is my troubles. Hardly a 1T out there with a bed for me to compair. I have found a small handfull, and a large fist full of stake/flat beds. I cant find some emblems (the 3800 side badge) and the rear bumper and brackets. I am getting to the point I am just going to use the regular 3100/3600 bumper.
Best of luck, post pics!
Chey
LOST1953
My favorite color is CHROME
The ugliest trucks are driven by the prettiest girls

I dont suffer from insanity, I enjoy it!
O Lord, WHY did I buy another "Thing"? (again??)
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1953 Chevy 3800 1-ton Gallery More photos at MSN ----