Nice score on that bumper! One slight concern about it, it will probably make your front end sag a little. Especially if you actually throw a winch on it. On the flip side it does solve your lack of front recovery points issue.
Here's something kinda odd we've seen done to avoid the crumble zones weaknesses - literally chaining up the front bumper to the frame rails back behind the crumble zones. The particular truck had a pair of those high-strength eye-bolts used for lifting and moving heavy machinery (lathes, mills, etc) bolted to the front wall of its engine crossmember, passenger side was right next to the frame rail and driver side was as close to the steering box as they could get it without the chain touching it. On the back side of the crossmember wall they had added some thick steel plates to spread the load applied by the eye-bolts. Then the front end of the chains was attached to the bumper on the back side of the recovery points. The idea was that during recovery pulls (truck frame is in tension) the slightly pre-tensioned chains will transfer a lot of the pull force from the bumper directly to the stronger parts of the frame, thus bypassing the "questionable" crumble zones. On the other hand if the truck were ever in an accident, the chains due to their nature would offer absolutely no resistance against frame compression, thus allowing the crumble zones to do their thing as the factory designed them to. Might sound redneck as heck to some, but I think the reasoning behind this setup was pretty sound...
Are you 100% sure on your 3.08 gears? Yes you could get a 2wd truck with them, but I don't recall ever seeing a reverse-cut D44 (Ford's front axle) with them... In any case, with the 3.08 your NP435 is pretty close to a typical wide-ratio ZF5 with 3.55s, in fact at say 60mph your engine is turning only about 200rpms faster. Gears 1-3 are darn near identical between the two as far as wheel speed per given engine speed goes. We've had the opportunity to drive a 300I6 F150 with 3.55s and a ZF rolling on 33s, the thing had absolutely no problems pulling off a dead stop uphill even with a camper trailer behind it. What I'm getting at is that what you have now should work very well for a camping and just general truck duty purposes, I see no point in spending all sorts of money on regearing the axles and switching to a 5-speed.
Random NP435 stuff you probably never thought about: if your factory shifter feels kinda awkward, try using one off a '70s Ford with a NP435, it's a direct swap and after straightening the top kink and readjusting the lower bend (few minutes with the oxy-acetylene torch) it can put the shifter knob in a more comfortable location. Also the shifter knob off a '80s GM truck with a SM 4-speed transmission will spin right in place of the factory '70s Ford NP435 shift knob - the GM one is IMHO of much better quality, it's solid steel inside with a rubber cover and overall more comfortable to grab. The GM shift pattern reads L-1-2-3, if you wanted you can change this using a piece from a '80s Ford with a T19 transmission, we left ours alone tho cause we thought it looks kinda cool.
I saw someone suggested that you swap your rear axle to one off an early '80s F150 - unfortunately you can't easily do that. I mean yes the 9" axle will bolt up right in place of the 8.8 you have now, but it lacks a tone ring and a VSS on the pumpkin. If your truck was one year older you'd be just fine without them as all you'd lose would be the ABS, but starting in 1992 in Ford trucks EVERYTHING that somehow needs vehicle speed information uses that axle VSS - this means speedometer, odometer, ABS, and cruise, none of it will work with a factory '80s F150/Bronco 9" rear axle. Now, given the 9" uses an all-steel housing (piece of cake to drill, tap, and weld onto), I'd imagine it'd be pretty easy to install the VSS into that - but the VSS has to read off something, and that something is the tone ring typically attached to the differential flange for the ring gear. Does someone make a tone ring that can fit a 9" diff - probably, as 9" axles are still pretty popular for racing applications powered by EFI engines via computer-controlled transmissions. Heck for all I know there is a whole 3rd member somewhere out there that is set up with both tone ring clearance and VSS port, but being used to the 8-lug 1-ton stuff I simply don't know what's available in the "halfton" aftermarket world... Something for you to looking into it maybe?