1. Lots of very small black 1mm grit/debris that looked like carbon.
It's coming from your charcoal can at the right front corner of the engine bay. Time to replace it with a new one; part numbers here
. In the meantime, disconnect the hose that runs from the top front of the carb to the charcoal can (connected to the "CARB" or "BOWL" port on the can) and just leave the carb fitting open to the air until you can replace the can.
So I looked in the Walker catalog and found the part #64-379 and ordered it but soon received a call from them saying the don't make it anymore!
A lot of the repair parts for carburetors are going obsolete from all makers. You may want to check with www.thecarburetorshop.com
and see if they can supply the item you need. Give them the Walker part number and item name.
Am I looking at a new carb since I can't seem to find this one part?!
I found one here
No, you didn't -- that's a "remanufactured" carburetor. They are junk!
See if you can find the repair part you need, either new or good used. If not, I have a new (not "remanufactured") carb for your application; send me a PM if you want to buy it.
FTR, the 1920 is not a better carb design than the 1945. The opposite is true; the 1920 has several serious design deficiencies because the primary design goals for it were cheap, cheap, and cheap. The 1945 has several concrete design advantages over the 1920, but the first couple years of 1945s were buggy and most 1945s came from the factory jetted very lean for emissions compliance -- not hard to fix. Fact is, both carbs (or a BBS, or a BBD, or any other original-equipment slant-6 carb) can be made to work well if
they are in fundamentally sound condition to start with. That is growing to be a bigger and bigger 'if' as these carbs accumulate decades' worth of use (and abuse at the hands of "remanufacturers").
Too many people who were born on third base actually believe they've hit a triple.