I've located an old Case tractor-gas, 4 cylinder. It's missing some sheet metal and the magneto. Front rims are rusted through and the rest of the tractor is rusted. I don't know what model it is--(maybe a CC)--there's a date on the block 10-23-35. Is this thing worth restoring? Are parts available? If I can't get a magneto then there's no sense in moving forward. Any advice appreciated.