Ok so how are the decks driven on a 2000 series? Off the front of the engine like the Mags? So the pullies are not interchangeable? So if i go with Command from 2000 series, attachment use will very likely be hampered. And as far as different drive belt length, that would be a PIA to find a quality one?
Some pics from the one I rebuilt. I never had any starter issues. Exhaust gaskets shouldn't be an issue. Carb is one of the more complicated Briggs designs, down draft, concentric, and incorporates the Briggs vacuum pulse fuel pump (makes them a SOB to rebuild, and cold blooded starters if they sit for a long time). I also had to replace an ignition module on one (on the way to a plow day at Travis's!!!)
BUT......it's a stout little motor that runs out nice when tuned well.
Starter has a plastic bendix gear, which stripped on mine. Seems like a stupid thing to be made of plastic. Mine was a 580, a bit newer, and may not have had cast iron sleeves. I had to rebuild the carb, and I was glad to have the service manual to put that back together.