Welcome Mark,
I bought a '76 CB550K US import a couple of months ago, carbs also full of cack, also stripped the bike down, frame etc due to be picked up from the powder coaters this week. The folks on the forum have been super helpful and patient. As my previous experience is limited to a rebuild of a Suzuki GP100 engine, top end rebuild of a Morris Minor and general rebuild of a 1952 Triumph Thunderbird I need a lot of help!