Sean,
I don't think your comment about bent wheels is sarcastic. It's probably true.
Regarding newer aluminum wheels on older trucks. While my 2000 aluminum wheels will mount to the front axle of my 1995 truck, they will not mount on the rear brake drums. The drums are about 1/8" too big in diameter. I have heard of some drivers having this 1/8" turned off by a shop with a brake lathe.
That will probably get the wheels mounted. However... (You knew there had to be a "however" didn't you?) The backspacing on the newer wheels is greater than on the older ones. That is, the newer wheels will sit farther inboard than the older wheels. (They won't stick out to the side as far. ) I don't know whether or not this causes a problem with rubbing or anything else.
Also, I'm pretty sure that there is a difference between the lug nuts for aluminum wheels versus nuts for steel wheels.
Last, the hubcaps from an aluminum wheel will be loose if used with a steel wheel. The hubcaps from my 1995 (steel wheels) will not even mount with my 2000 aluminum wheels.
Loren