Haven't done this personally, but friends of mine who've done the Mustang II front end have had mixed reviews. Some say it is not too bad and some say it turned their truck into a mess...no longer like a pickup at all. These folks are not beginners at this sort of work, either I should add...that is to say steering geometry is well-known to them. The ones who haven't liked the change have said it was just wrong for a pickup and have said given a chance to do it again they would use a real truck front end or at the very least a Nova front clip. It also changes the ride height, and while some think that's fine to ride low...others don't. And that includes me. You can do this in a manner in which your original height is preserved, but it does take some extra work.
If it were me, I would think long and hard about ever doing this. You can add electric power steering to your truck and add some more caster angle in the process if you want (to make it more stable). In my opinion that's more sensible than a fluid power steering system given you're working with a 235. You can also re-do your brakes completely and have brakes that will stop you just fine...even at speed. The MII front end was designed for a second or third rate compact car built at a time when Detroit was wrestling with how to make cars lighter and more economical. Ask Evan (coilover). I think he'll tell you there is a world of difference between one of these done correctly and one done incorrectly. Often the difference is measured in $$$ spent and who did the work. Get the steering geometry out of whack and you'll hate it, plus it won't be safe. And...it has been mentioned here before...you may discover there are insurance concerns when you start monkeying with steering, suspension, etc. The worst time to learn your insurance company has a problem with something is AFTER a wreck, so you need to let them know up front. Good luck!
