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I would say it would be workable on Diesel, Kerosene, and oil blends. But not gasoline.

It's not so much the combustion chamber being the problem. It's the injector placement and angle that's the issue. A 12 valve cummins could be used to get you close, but the injector tip placement will never line up like you'd want. Custom cutting the pistons wouldn't be that hard. Designing...

It will run on a mixture of WMO. No diesel engine will run solely off propane. Methanol, not sure why you'd want that.

I've got a Cummins in my pickup, I'd rather have the multifuel capabilities. If I were to do a Cummins, it'd be a 12v p-pumped engine though. VE's just aren't going to stand up to heavier fuels like a P-pump will.

You could probably have the cam ground and have some rollers built for it, but you're talking the cost of several trucks in just a cam. If time and money were no object to me, I'd take a LDS. Tear it down and rebuild it. Balance the bottom end. (Crank, rods, pistons) Add a girdle for the...

Ummm, go study the cross section of a modern diesel engine and the cross section of a multifuel combustion area. You'll find a great deal of difference. A modern DI diesel has the injector at a 90* angle in the center of the piston. The bowl also has a crown inside of it as well. The...

Pistons with bowl/swirl design, injectors, angle of injectors, angle of spray pattern, injection pump that can adjust by fuel density. Oh, and lots of money.

They bypassed the FDC. The engine can still run on a range of fuels, as the internals remain the same. But it will not automatically adjust for various fuel densities. It was done due to the FDCs having the tendency to leak into the engine, diluting the oil with fuel.

You can convert a multifuel to pure diesel by installing tractor pistons, heads, injectors, and IP. But why spend all the money to loose functionality? There's no gains to be had. The tractor engines actually were rated with less power and less RPMs.