70s Bronco/F150 44s are only 65 WMS to WMS. So run a 4" BS wheel and you are really close to where you want to be. it would be close, but not quite, to running a hp30 with like 2" BS wheels. No need to narrow. if you go full width at like 67" then id start considering narrowing. Thats with a 15" rim. Now, you can clear steering knuckles and brakes with a 17" rim and run more BS like 4.25 or 4.5 , but then you run into the hubs sticking out too far possibly up front if you go past 4.5" BS.
All I am trying to do is help you out to prevent from my dana 30 fiasco to happen to others. I had way more money into my 30 than my 44, and my 30 broke R&P at that point. I am not a fabricator, or even really know what I was doing, and even I still managed to get a hp44 under my rig. If I can do it, anyone can.
Although, if you are running 33s and smaller, keep the 30, just slap a lunchbox up front, some ABS shafts(the big ones) , ruffstuff cover, and call it done. don't put another cent into it. Since you have some of the WJ stuff, consider finishing that off, all on your current 30. don't pay 150$ for a 30 housing.