Well i sure don't agree with using a Chevy because it's more popular. That's a cop out.
On the other hand i can't imagine anyone wanting to use a 534 SuperDuty truck engine in ANYTHING! Sheesh, the thing weighs as much as a whole pallet full of smallblocks and puts out less horsepower than one.

But like i say, if nobody is using MEL's now when they can be bought cheap, what makes you think there's any market?