I'm not sure what engines they are for, but perhaps you should contact the Confederate Air Force. I'm sure they would be able to tell you what engine(s) they are for, and perhaps whether or not they could use them. If the CAF could use them, and you were to donate them, I'm pretty certain it could be used as a tax deductable donation to a NPO. The CAF can use all the support they can get to keep their beautiful birds flying.