See those look the same as the one on the parts truck I'm getting. It's a 91 2wd single cab. mines a 93 ext cab 4x4 and they look different. Thx for the pics, I think I'm gonna just build them. I want to use thicker steel anyway

 

Going off what I just measured. The mountains t boxes on my Truck are 3inches tall where welded by the fire wall and 21/4/ - 2¹/2 Inches on The rear side where they're welded to the floor. I dunno, once I get the new floor section out of the parts truck welded in I'm going to build some mounts and call it good

 

And if you look at the pics the drivers side looks different from the passenger side. Passenger side looks a bit taller and more square