My buddy rebuilt the Carter AFB on the 401 and we fired it up Saturday, here it is... 2 fuel filters inline since the tank is full of rust and when he rebuilt the carb it was full of rust, so this will do until spring when we can drop the tank. https://www.youtube.com/watch?v=NfvAr--ZDJ0&feature=youtu.be
Some advice on your tank: I had to have mine (64 Wildcat) repaired at a "gastankrenu" franchise due to pin holes in the top and surface rust in the interior. I recommend them but they are pricey. The filler neck is a b*tch to remove and I ended up cutting mine about 2" from the tank with a Sawzall. I had the renu dealer weld on a 2" bung where the OE tube passes through and used a piece of gas resistant hose to connect it to the upper half of the filler neck. I believe I have a thread on this on this site. Before the repair the stock sock filter on the bottom of the pick-up assembly would plug every 50 miles. Once I removed it I also ran two in-line filters, the first of which would last about 100 miles before becoming plugged with rust enough to loose power at higher speeds.
Thanks Mark my dad talked to a guy who specializes in early Buicks and he said the same thing, hardest part of removing the tank is the filler neck - it is attached with an O-ring that dries out and turns solid. He recommended spraying it with WD-40 quite a few times to get the rubber soft enough to come off. Of course the Sawzall is a last resort method. He was going to try the POR-15 gas tank treatment kit depending on how bad it is when we pull it out. This summer he put in a new sending unit, the original sending unit did not even have a sock on the end, the hose where the sock should have been was completely rusted away! Guess it's part of dealing with a 52 year old car. Dave C
Keep us posted on your progress. I tried Kroil on the oring to no avail. I've never had much luck with fuel tank coating. Getting it completely clean is the trick. I've not tried POR15 though. The renu process is to cut the tank in half, sandblast inside and out, reweld, and then coat inside and out. Inner coating is like a porcelain. Outer is sort of rubberized. Cost was about $700 w/ shipping for mine which had more rust than typical.
