Switching engines good idea?

I have a 2002 Ford Explorer v8 with 4.6L built in 02 of April so the axles and trans have differences, and I have also a 2000 Mercury Sable ls so the automatic shifter is in the center council, my question is if it is possible to tare out the bad transmission and engine off my sable and put the 4.6L v8 off my explorer and replace the block with the sable one, isn't it the same engine the Crown Vics have the 4.6L, I don't want to buy the Crown Vic I want it to be my project and I need a new engine and power train on my Explorer anyway because they have about 200,000 miles on my Explorer, so is it possible to make more power into my Sable with switching the blocks?