Okay, there's something wrong with these replies. I'm going to address each one so hopefully we can get to the bottom of the confusion here.

What do you think camber is? If you are looking at the front of your vehicle, the camber is what makes the tires look like this /---\ or \---/. (Please excuse my line art.) You want the tires to be closer to this |---|. While affected by raising or lowering the truck, camber is adjustable independently of the ride height with the correct parts. The correct parts of course varies by the amount that camber needs to be changed. All that said Camber will not affect the things you are concerned about, what it can affect are steering, handling, and tire wear.
Also lowering will not affect your load capacity unless you modify the rear spring pack, or lower it to the point that you do not have enough clearance under load. Front suspension will not noticeably affect your load capacity since the loads that you refer to will be mostly on the rear suspension.
As for being a PITA to drive around your yard, once again camber doesn't matter. What will make it a PITA is ground clearance, that issue comes from ground clearance (AKA lowering it another inch) not from camber. Unless you've got one hell of a rough yard then the amount of lowering to which you refer will not be an issue.
The only lowering kit for a torsion bar Ranger is flipped re-indexed keys. You get pretty much the same result from flipping the existing keys from my understanding, maybe not quite as much drop, but should cover the 1" he wants. If you want any more than that it's time to get rid of torsion bars and start into custom suspension components.
You back is stock? Looks lower than stock in that pic, must be the angle. If all you want to do in the rear is remove the lift block then you have nothing to worry about as far as load capacity is concerned. If you want to go lower in the front, the next step is flipped keys whether they are stock or aftermarket. Regardless of the method, lowering any more will add more camber. You just have to adjust the camber out once you get it to the height you want. The only other way to get rid of wheel gap is to move to a taller wheel/tire combo, probably with a little less backspacing to make it look good.
I really suggest looking for threads about lowering an Edge (Ranger), stock for stock they had the same suspension as the truck you have. IIRC the Sport package was the name replacement for the Edge package, then the Edge package was moved over to a 4WD in later years before becoming a separate vehicle.