I am now the proud owner of the club's 3800 "Formula" ("Formula" in quotes, because it began life as a duke coupe). I can't register it yet, but we're working on that.
Here's what the engine bay looked like when we got the car...

Here's what it looks like now...

Besides the obvious changes of the cleanup and new spark plug wires, you may notice that some if the wire loom has been changed. Some of the original wire loom was so brittle that it would crumble if you tried to move it a little. I replaced it with a braided high temp wire loom.
In the last test drive I told you about in the other thread about this car, the speedometer did not work. In the previous test drive, it did work. I basically spent this weekend trying to find the problem. I jacked up one rear wheel so I could idle the car in gear for testing. I finally found a bundle of taped up electronic components behind the center console (where the ECM would be in a normal Fiero) that, when wiggled, would make the speedometer work sometimes. This bundle had so much tape and heat shrink on it that it was difficult to tell what components were there. So I did a little research. It turns out that the Fiero speedometer needs the following circuit to work on a 3800:

So I went to Fry's and got the needed components, built the circuit, and soldered it in place of the old one, which I had cut out. The speedometer works perfectly now.
And BTW, after all the messing with wires I did, the gas gauge works now too. There might be something loose that i need to fix later, but I'll let it ride for now.
So with the gas gauge working, I put one of my other Fiero's tag on the back, and drove it to a gas station to fill it up. The gauge reads quite a bit above full, so I figure it will read quite a bit above empty when it is actually empty. So I'll refill it when it dips below half full.
And after returning from the gas station, the engine was quiet, with no loud tapping. I think it likes Mobile 1 oil.