What is interesting are the dyno specs from clapping two low PSI turbos on the venerable Ford V-10. It will need a new tune to understand that it isn't a NA motor anymore, but even a slight boost in pressure to compensate for altitude does wonders for this engine. The engine has a lot of cubic inches and low RPMs, so even a 5-7 PSI in boost would make the V-10 compare favorably to a diesel. It won't BE a diesel, but it will give them a run for their money, albeit at a higher RPM range.
IMHO, it is a matter of won't than can't here. Ford's EB proves that one can make a gasser with the torque/power curves similar to a diesel.