clutch and flywheel are the same but the fork, slave and throwout bearing are different.
the w56 is about 6 inches longer than the L43 so you will need to move the crossmember back and your driveshafts need to be swapped for the newer truck (what the w56 came from) or you'll need to shorten the rear shaft and lengthen the front.
almost the same as you would have to do if you installed dual tcases.
OR you can get Marlins L52HD
http://www.marlincrawler.com/transmission/rebuilt-complete/l52
