Carburetor
So here I am with a 42 year old carburetor, a "Quadrajunk" ... yeah the Quadrajet gets a bad reputation, some guys don't like them, but I think those guys 
just don't understand. You only have to hear those secondary throttle blades open one time to fall in love with the sound. They're a pain in the ass, but they're a good solid carb when you get them dialed in. I really wanted to keep my QJet, I tried, but it just wouldn't co-operate with me. In the end I caved and bought a cheap knock off from China. Same basic shape and function, substandard materials and quality. Before making this decision, I went through hell, settle back and prepare to laugh at my ineptitude.
I installed a new fuel pump and was immediately confronted with a flooding carb. Surely it was no 
coincidence that these things happened at the same time, so I just figured debris was plugging the needle and seat. Debris from changing lines, and just generally agitating the system. The fix for this issue is to replace the needle and seat inside the carburetor. I was quite reluctant to open a new can of worms by taking this carburetor off, so I did the idiotic thing, tried to do a rebuild kit while the body of the carb was still in place.
I removed the airhorn and grabbed a ruler. It was apparent to me that this carburetor was pretty warped. People often crank these down too much, and they can get twisted up. 
You really only need 12 ft/lbs. I already had the rebuild kit, so I had noting to lose by installing it.
Instead of using the standard airhorn gasket, I special ordered an extra thick airhorn gasket here. These thicker gaskets can make up for some of the warpage. Unfortunately, it didn't work for my application, and I ended up wasting a bunch of energy taking this apart 3 times, and having it off the car twice.
Remember that knock off carburetor I was talking about? Here it is. It looks pretty, and it seems to work well enough, but the word is that these things are very low quality, and don't stand the test of time.
That's where I am now. The rebuild kit with the thicker gasket didn't cut it. There's a guy nearby that takes these old cores, and straightens them back out, does a full and complete rebuild, that will likely be my next step. These things went out of production in 1989 are not available anymore.