200Tdi and LT77 was the factory setup back in the early 90's when the Tdi was introduced. a year or so later LR brought out the LT77S, which had slightly better synchro's on the gears.
So yes, it's fine, it's bone stock like that.
the R380 was never sold with the 200Tdi, but was available for a retro upgrade from the factory. it came with the stubby bellhousing so that the original (200Tdi) prop shafts could be used.