One piece of disassembly I hadn't done was removal of the jet block. I wasn't sure how it was connected but a bit of searching led me to believe that it is simply pressed in. It is, in fact, a press-in assembly and a few light taps with a dead-blow hammer using a deep-well socket as a "punch" knocked it right out with no damange. here is a small screw in the carb body that keeps the jet block from rotating that must be removed. The block had a fair amount of oxication holdin it in place but it cleaned right up. My rebuild kit included the paper washer which fits below the jet-block.
I did all the cleaning outside in the morning while it was relatively cool. I'd done some rubbing with scotch-brite pads to get the worst of the grime and oxidation off of the main carb body and used carb cleaner on everything else. I read somewhere that a dip in a 3:1 mix of water:muratic acid would brighten up the aluminum so I figured I'd give that a try too. This treatment helped remove most of the oxidation, especially in the hard to reach corners and crannies. It probably would have done more if I had let the parts soak longer. I only put the parts in the mix for a couple of minutes before reinsing them and neutralizing the acid. A quick spray with silicone lube once dry gave everything a nice luster and should help protect the parts from oxidation.
My rebuild kit included all the gaskets and I also ordered a new float needle. Everything went back together without any issues. The slide and barrel look good and slide well without slop. I shouldldn't have to open her up again unless I have to re-jet one of the circuits after I get her running. I put the needle back in the same groove I found it - assuming it ran that way some time her distant past. I won't know if that was right until she runs.
I need to find a new o-ring to fit between the carb and engine, an air intake tube, and some type of filter and I'll be ready to mix air and fuel.
Here is a picture after the clean and rebuild. The carb is an Amal 376.
