once the alignment was confirmed, lots of gusseting with 1/8" plate (same thickness as the frame) -
top and bottom plates like these (top is 1/8", bottom is 'rock-resistant' 1/4") -
boxed completely all the way back with 1/8" -
and then in-boarding/lifting the cab and core support mounts enabling the use of all the OE bushings and bolts -
Of course there's plenty of finish welding and such, but it's done enough to continue with mock-up, and then comes the engine and trans mounts, belly cradle, gas tank mounts, and finally, "suspension".