Okay, well I just spend the better half of the day dealing with this mess, and here's what I found out:
1) The truck fuel pickup assembly does not directly drop in the Bronco tank, the clocking of its locating tabs is 180 degrees off - I chose to cut one if the tabs off, thus allowing me to install the sender at only 30 degrees off position, which is no big deal.
2) The truck sender is mounted at an angle, the Bronco sender is straight upright - when you go to swap the Bronco float and arm to the truck sender it turns out the float hits the back wall of the tank halfway through its travel - I bent the return line the sender sits on so the sender gets upright like the Bronco sender is, then the float works like it should. Some tweaking of the bends in the float arm may still be necessary to make the thing behave like you want it - I made mine so its lowest position is a good inch and a half above the tank's bottom, which means when the gauge hits "E" I'll still have a few gallons left.
3) extending the fuel pickup tube - oh what a ***** that one was, depending on how you do it you may end up unable to install the whole thing in the tank due to both the float arm and the pickup tube being stupid-long. I had to redo mine twice, cause the compression fitting wouldn't seal right the first time around - second attempt was with a Swagelok fitting and as expected that sealed good. I kept the shower head at the bottom of the whole thing, as it was in very good shape.
4) fuel fill hose - that was right on the money as far as length goes, but the diameter of the truck hose is smaller than the neck of the Bronco tank. You can force the truck hose on the Bronco tank neck, but it's a pain - I had the tank against the rear wheel and was leaning on the hose quit heavy to make it slip over the fill neck
5) straps and such - bronco tank is not as long as the truck one, so if you keep your truck-specific top straps the tank will try to slide fore-aft on you as you install it. What I did was remove the truck-specific top straps, and installed the Bronco-specific straps in their place, they ensure the tank will stay right in the middle of the space available for it between the two truck crossmembers. Now this is where it gets interesting - for bottom straps you have several choice, you can reuse the truck specific ones with a foot long of allthread rod at each corner, or you can use the factory Bronco skid plate and add a new crossmember to truck frame for that skid plate to bolt up to in the rear, or you can do something custom - I reused the truck-specific top straps and extended then by about a foot, put some new bends in them, and that's what holds my tank in right now, looks and fits pretty decent actually.
Also if you haven't done the rollover valve mod, now's a good time to do it. On another note, the bronco sucks fuel from the front center section f the tank, there's no real sump like diesels have in the middle of the tank bottom. Which would mean that if you're low on fuel and start pulling up a grade you may airlock the engine...
