A thought on the gas tank ... Many of us drive our trucks a LOT and we still live quite well in the cab with our gas tanks. Some of us even enjoy a smoke of some kind, too (I enjoy a cigar or two on most of my cruises and I haven't blown up yet). Ask around to see if anyone has even heard of one of our trucks blowing up from the tank in the cab.
BUT ... DO replace all rubber fuel lines (including the fill tube connector) with the new ethanol tolerant rubber (even if you won't be using ethanol gas), and make sure all your steel fuel lines are replaced. Check your tank, too. If you have any doubts, replace it. Most of the parts sellers carry replacement tanks of good quality. I have a new tank in my truck (From Jim Carter) and I'm perfectly happy with it.
As long as we're on safety, you might consider adding seat belts. I used the Juliano's kit in my truck. I'm not sure if they make a kit specifically for the '46 or not. But the kits seam pretty universal and if I can install one, the gang here will tell you that you can, too.
On an administrative note: About those newbie questions, here's the deal -- We want you to ask as many as you can think of. Put these guys to the test and see if you can "stump the chump!"
And then here's the catch: Once you've learned something, or a lot of things (and you will), you have to share them with the newbies who come after you. Some of these old experts around here are starting to get on my nerves ... (They know who they are

)
Welcome aboard, too!