help with details of 68 c20 4x4

[dishow]

hi.got a truck the other day just so i wouldnt go to crusher.now im trying to part it and hope i at least break even.anyway,what i want to know is stuff like what motor,tranny ect.theres no paper in the glove box to tell me.i'm gonna say it has a :

307?
rockwell transfer case
4 speed tranny...dont know the model
closed knuckle dana 44HD front end
rear is a big round 10 bolt.3 bolts on top,three on bottom,2 on each side(if that makes any sense)
have no idea of ratio or even what was available in 68.

so thats what i need help with.
thanks.