Does anyone happen to know if the FSM shows where the regular cab long box truck is longer than the regular cab short box? I am trying figure out if the LWB frame is any longer between the front cab mounts and the upsweep, if so by how much. Does anyone know where I could find detailed measurements of these frames?

Thanks

 

my '92 fsm has a section including frame measurements...i would look, but i am many miles away from the fsm

 

I am pretty sure that the frame is longer on the flat, rearward of the upsweep. The back of the bottom of the regular cab is raised to accomodate the hump. It's why the floors aren't flat.