Custom 1987 GMC Crew Cab Short Bed

[OYMC]

What is stronger when sectioning a chassis, a straight cut or a "Z" cut?

Answer: "Z" cut.

The edge where the two points of the chassis will be joined together is about 5 3/4" trailing where the chassis begins to taper (Height of chassis decreases in measure). By measuring down 3 1/2" at both ends of cut marks the height of the chassis is nearly split in half. I measured down 3 1/2" from the top edge of the chassis, and placed marks in multiple locations. I then aligned a straight edge to these marks and scribed a line down the length of the chassis being sectioned. *Run the line about 5" past the vertical cut lines. This will help with realignment of chassis prior to welding.

From the mark placed 1 1/2" behind front bed mount hole I measured 5 3/4" forward along the 3 1/2" middle line. I then scribed a "Square" vertical line at this point.

From the trailing mark I repeated this process...