hemi information

Ive never even looked at a car with a hemi in it so I dont know a lot about the hemi's however I think that there are more then one size hemi.
The reason that I bring this up is I found a 65 or 66 barracuda sitting behind a house that the lady that lives there says she wants to sell it. Its not worth much as it has rust but I want the steering wheel and horn button. While talking to her she tells me she inherited this from her brother inlaw that past away a few years ago. then she tells me there is a hemi in the basement that she wants to get rid of as well. So i plan on going and looking at these next weekend but would like some information and what are the different hemi's worth? What would it cost to have them rebuilt just making them stock if it would take a valve job, hone and new rings and bearings? would an early A body car handle a hemi and what suspension changes would have to be made?
Then theres the question of what transmissions bolt up to one.
I know i probably wouldnt want to tackle anything like this and Im not a fan of a b body car so maybe for the right price I could flip it. Then again maybe its not really a hemi or she would want to much to make a deal.
Would just like to know some things before I go to look at all of this. SHe told me her BIL was a collector so I guess I will see.
Thanks Rod