I don't think so. I believe that propane is mostly used in a low fuel, stock-ish application where the amount of available injected diesel is the limiting factor. Most modern systems have plenty of diesel available to inject. 7.3 powerstrokes were limited on fueling in stock-ish form, and propane gave a good power improvement when using a stock-ish turbo. The danger with propane at higher levels is that it will autoignite prior to the diesel injection and cause detonation. (like using low octane fuel in a high compression gasser). Diesel static compression is 17:1+ and with the addition of few pounds of boost (50-150) you heat and ignite propane far before the diesel injection event is initiated on the compression stroke.
Nitrous, though is not a fuel. It's an oxidizer that allows much more rapid combustion than plain air being that it's a far higher concentration of oxygen. That's why you see his cloud clear up when he hits the nitrous. The danger is that when you spray so much, the injection timing requirements are reduced significantly and can also cause peak cylinder pressure to occur too early in the cycle, thus causing the head to lift, pistons to crack, rods to bend, and in this case, the block to split.
I could be wrong. I've been out of it for a bit.
