'68 Stepside K10 - In Bed Spare Tire Mount?

[katwalk]

I am wanting to mount my spare (33 x 12.5) in the bed of my step side. I am thinking of mounting it standing up on the side of the bed behind the driver. I am NOT going to drill any holes in the truck to make this happen, so plan to have the bolts holding the fenders on do double duty. I bought a generic tire holder that I plan to tweak and fab up something, but wanting to see if anyone has done this or what you creative minds might think.

Here is the location I am thinking of putting it and the targeted mounting bolts.

Thoughts?