if you really want to do the work yourself then make sure you get a friend who is experienced to help you... its not as simple as removing stock pistons and putting in new ones.
if you are going to rebuild then do it right with all new gaskets, bearings, pistons and rods. your block may be junk as well due to cyliner wall scarring ( no oil is a b****) but it may be able to be honed, or bored out. if you have to do this then you have to order some forged pistons (at a bare minimum) and you should also buy forged rods to go with them (might as well do it right)
I personally recomend Oliver rods, CP pistons, and Toga Bearings. for the most part, gaskets are gaskets (excluding head gasket, which is critical)
but if you have no mechanical knowledge, and no experienced friends, then buy a short block from MAM (click in the link in my sig for contact info) because they are near perfection.