well detroit diesel guaranteed it.
they had a program where if you bought one their 2 stroke engines new for your project they would exchange cylinder heads, injectors, fuel pumps and supercharger/turbos etc until that engine was running with the best performance and economy free of charge. apparently there was 30 different combinations of heads and injectors

a family friend was factory trained on detroits and had a argument with the local agent who didnt believe him when jeff was helping build the tour vessel the lady musgrave.

i know some people with a classic oliver eltoro 4wd tractor that is powered by a 4-71 its owner uses it in tractor pulling demos they dont need the PA to announce the tractor pull is starting they just fire up the oliver and give it a rev. he put a extra muffler on at one event cause some one complained very quickly the other exhibitors removed it. and yes its driven in first low gear as all moving things are to travel at walking pace.