A few updates have come to pass.
I purchased these, and put them on tonight: Oldsmobile Rocket Rims Center CAP Decals | eBay
Admittedly, I wasn't expecting a simple printed decal, I was expecting it to be a raised plastic type. At any rate, it was cheap, albeit a hair too small for the space I wanted to use them in. The looks settle down a bit once you put some distance on them however.
The results, and the current standing of the car:
I am approaching the end of the first tank of gas, so fresh gas should be coming soon. So far it has been fairly smooth sailing. When it is cold out, the car acts like it is down a coil, which makes life pretty interesting. Also the car is prone to stall. It'* still intermittently setting code 42, usually when it'* throwing its horrific tantrums. It has also been throwing lean codes, and has been exhibiting some odd behaviors that cause me to suspect the TPS is having troubles too.
Still no regrets, but it'* looking like the honeymoon may be over, and it'* time to start getting down to business, which the first order will be to dump the magnavox ignition system in favor of the newer delco style, and do some harness repair for the ICM as well, because dryrot.
It also took a blast of rocks (5-6 hits) thanks to an idiot on the interstate on Monday, which has cost me the original windshield. It chipped at the bottom, and cracked out before Safelite could get out to repair the chip. That really makes me mad because it still has the original dealership windshield sticker and "GM Protection Plan" sticker on there, and I doubt those will survive any kind of move.