Looks pretty much like any 5.9 ive ever torn down. Clean everything up, and put it all back together. +1 on plenum gasket failure. While you have your heads apart to put the new springs in i would suggest a valve job, at the very least lap them in, doesnt look like they were leaking between the seats so you should be good to go. I would bet the lower end bearings are fine, however a new set is like ~60 bucks, just good insurance. i also like to use the mr. gasket 1121g head gaskets for a little bump in compression. Should be a stout little truck motor when youre done.
