Some more parts have arrived. I got the bellhousing, which is a standard unit for a T56 to Chevy LS engine. I also got a T56 adapter kit from Dieselpumpuk, which is designed to work with the LS bellhousing and connect it to the Mercedes OM60x series of engines. The kit also came with a heavy duty clutch, hardware and clutch slave cylinder spacers.
Right now I'm trying to figure out what I am going to do for the clutch pedal. I'm leaning toward an aftermarket Wilwood option. There's also the Wilwood pedal assemblies that have the brake and clutch pedals/master cylinders. That might be an interesting option. That scenario would have me going full mechanical on the brakes with no booster. The wise choice would probably be to just stick with the factory brakes and find a standalone clutch pedal assembly that fits and clears the factory brake booster.