[likearoc]

i have 69 gmc 1/2 ton custom cab leaf spring lb i want to make it a sb body/frame are in grate shape and rust free. i have a bed. anybody done one?

 

[monster76]

I have shortened plenty of heavy truck chassis but those are a differrnt animal, when ever i get a call for a smaller truck like an f450 or similar truck i cut behind the cab and remove the length of chassis needed and bring them together weld and then i get a peice of channel that fit snug inside the chassis drill that and the chassis and bolt it together. Then the usual drive shaft fuel line etc.. i have done countless in this manner and never had had one failure i have done this with smaller dump trucks, tow trucks, car haulers custom flatbeds. This was a condensed version of how i do it. Theres alot more to it but i think you get the general idea.

 

[matt167]

It has been done. There is a spot in the middle of the bed area that gets cut and shortened. It's where the factory put the SB/LB difference.