i have an early 80s 611 that my dad bought new and was used as a loader/auger and small tillage work tractor. the hour meter quit at 672 hours but this tractor likely has 10000 hours on it.i want to re-ring and do a valve job and possibly do the pump and injectors on this tractor. is there such thing as aftermarket parts for this tractor? or do i have to find a belarus dealer?