Cab and Chassis 3+3 F/B to Fleetside help

[Cabnchassis]

The flat bed had to come off my truck. Ugliness of f/b aside I don't enjoy talking to the highway hogs unless I fricken have to. In CA they were making me scale it, and since I have no commercial numbering so they make me come around for visual inspection each time. I used to have a class B and I'm typically more familiar with truck safety/law than the cops I talk to, but damn if that hi po truck cop can't find a handful of violations on every truck he stops I've tried a couple times to blow the scale but that led to a longer conversation and $160 fine and a few fix it tickets. One mud flap had a big hole, one marker light had lost its ground, too large a rock chip in my direct view, I had a 3000 watt inverter screwed into the bed on one side and it turns out even the inverter battery has to be in a box with a lid, we even got to use his fancy portable scales to make sure my C+C was within it boundaries to carry a furniture set to my sister (It was all I could not to laugh that he thought I was overloaded) I think when i pointed out that I was a mile away from the overload springs he got mad that I called him on it and decided to give me the business but I wasn't gonna play that game again. Had I not opened my mouth he might of weighed me and let me go on my way. Instead Scale violation and fix its.

Recently I cut off the flatbed and got it gone. Of course the fleetside I'd planned on fell through, so i'm still in the hunt for a long bed dual fuel door fleetside. Right now I just want to wrap my head around the project a little better to make sure it comes out looking clean.

I got fleetside idea from my BIL and when I searched around I found a few of you guys here had done them. I only really have two questions about the process.

The first one is the bed mounts. I'm assuming I can just go grab the whole mount at the parts store, correct me if that's wrong. I'm also assuming they used 4 mounts on the bed? I saw a couple threads with light detail about it but I'm just curious about what was involved in sticking them to the frame.

My second question is for someone who has done this to a 2wd model. I know have to tub the inner wheel well, and that simple enough, but the real question is about the bed and the outer. It sure looks like if the wheel travels far enough its capable of hitting the top the of the well (actually it looks like it would hit the hemmed sheet metal edge of the bed). So the real question is under payload has anyone had the outer dual hit the bed when you hit a nasty railroad crossing or anything?

It'd also save a lot of searching if someone had a good idea on what to do about a second fuel door that would be cool too. I'd like to not be splicing bed sides on or any of that, but that's my favorite truck and it's taking a lot longer than I'd hoped to find a dual door bed, so now I'm open to options if anyone has an idea that will look clean.