Anyone out there have any good tips on a source of information about rebuilding a Carter downdraft 2100S carburetor? While I have it off the motor, I thought it could do with a good going through seeing as how it probably hasn't had any work done on it in about 40 years. I thought about a tuneup kit, but then figured I'd just as well rebuild it with new parts. None of the manuals I have give a lot of detail about rebuilding. Any good suggestions would be appreciated. It's for a '53 Chev 3/4-ton and I'm putting in a '61 235 with my original manifold from a '55 235 that was in the truck. Thanks.