What parts can be used on '68 C-20?

[PKelly]

My dad has a 1978 Chevy Bonanaza in our barn that is rotten beyond belief. It has a 305 in it that is in pretty rough shape but runs. What parts can I use off of this '78 on my '68 C-20 that I'll most likely restore in a few years? Suspension? Tilt steering? Rear end (3.07)?
In other words, is it worth keeping this heap around? (the '68 has a 396/TH400 in it that I'll rebuild so the 305 is useless to me)
Of course I don't know what condition the parts are in but I'd like to hold onto them if they can be transferred to the '68 if needed.