[Accelo]

Sounds like you have a good plan.
The hose issues will be hose type, hose routing and adapting the hoses.
Planing for the return, if required, and the vent.
These are the easy issues.
Figuring out how to fill the tank is always the hassle.

I went the cheap route on a new aluminum tank. (Of course it was Made in China. They conveniently leave that out of the ad) Not only would it not fit without hitting the cross member for the bed. The bed the filler was offset from the middle by 3" and designed for a hole in the bed floor. The center is about the worse place I could think of for a bed tank fill.
The pump was also situated behind the bed cross-member which makes the lines difficult to run. You have to notch the cross member or run the lines a the side of the tank next to the frame. Makes it really difficult to remove and replace the tank.
I would purchase a quality tank for a reputable manufacture. I believe you can get them with the pump you specify. It gets expensive but you will avoid many of the hassles I had to deal with. If you want to save money use a solution like Markdtn did and retrofit a used tank. Still have to modify it but you know that up front.
At least you don't have the initial investment of a new tank that doesn't fit.
And avoid CPP truck parts if you can.