not sure of the weight, but its the cab and everything in it.
its a pretty critical dimension.
if your off, your front sheet metal wont align and body gaps would be off.
that's why the manual calls for shims there if needed.
A guy could make some spacer blocks the thickness of the dimension in the manual.
Set the cab on the blocks.
Bolt the shackle to the cab bottom.
Mark the frame with a transfer punch
using the holes as a guide.
drill
then bolt it up
