302 or 351?
Since you are going to junk it, just grab all the little stuff. Although I don't recomend using the intake or computer, grab them and keep them with the engine. That will get you extra parts for later.
Basiclly take fan to flexplate, throttle body to cats, intake to oil pan. When you remove something (like throttle cable) remove it from the body/frame and keep it. It is so much easier to toss extra parts later then it is to track them down.
Figure what you plan to use, then grab the next layer out from there. Too much is better then not enough.