david I actually considered both your points... yes it would mainly (until I move or get another job) be short hops to work, and you are correct that the engine would not bolt up to the tranny, although there are adapter plates that can be purchased. Not that I'm that fond of my current tranny anyway though lol
To be completely fair though, I did not count any money I get for selling the current engine against the price of the diesel, so it's still a toss-up. In all probability, if I do any engine swapping, it'll still be to the 4.9L simply because everything bolts up and if I can get $500 for my current engine I"ll have no net cost
but it's sure nice to fantasize about a diesel swap, especially one of the 89-93 12V 5.9L Cummins