In terms of the difference for swapping them I can't tell you but I have a feeling the LT1 would be more difficult to swap in compared to an LS1 because of the computer/electrical situation with our trucks.
Just my thoughts, but may want to change the way it was asked, or add something like this:
" has anyone on here swapped in a LT1 v8?
If so, how do you like it?
Would you do it again if you had the chance?
Or would you wait for a good deal on LS1? "
That may get you some responses other then search google