Re: 1963 GMC Step-Van 7
After bolting down the cargo bed, I got busy on the forward floor section sub-frame. I started with 2 x 2 x 0.125 HSS and made the frame risers which will support the forward floor section. In much the same manner as the rear cargo floor, I removed the original mounts with a cutting torch then drilled out the other pair of rivets. I mounted the floor risers using 7/16 x 1 1/4 bolts, washers, nuts and lock washers. I tack welded on a piece of 3 x 1 x 0.125 HSS to the risers, to set the floor height.
Next up, I prepped a 2 x 2 x 0.125 piece of HSS for the forward floor support, which the seat will be mounted to later, and also support the forward section of the floor. For the next step, I measured out the inboard side rail supports for the steps and fitted them to the front and rear floor supports. I had to notch out the inboard side rails so that the steps will line up properly with the floor when it is installed. I plan on using 3/16 plate steel for the forward floor section.
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