68 C10 vs. 71 C20

[68C10withA396]

I have a 68 C10, I found a 71 C20 that I am considereing using for a parts truck. Mainly using the bed, tailgate and miscelaneous other small items. I know there are differences between the years but what are some of the parts that can or can not be used on my C10? Any help before I waste my hard earned dollars would be greatly appreciated. If it's worth my time depending on condition (haven't seen it yet) would anyone be interested in some of the parts? I will subscribe to this site (as stated in rules) before I offer anything up for sale, but the parts will be dirt cheap just to re-coop some of the money.

Thanks
You all