Pistons..

No, those pistons will never get you to 10:1. See the part that says 1.74 compression heith. This is too short. You need the KB 167 pistons. their compression heigth is like 1.81. This is the part that sucks with the 318. to gain compression it is gonna cost you some $. (although the KB 167's are a good deal @ summit racing)
youe final compression ratio will depend on some other factors, head cc, deck heigth, head gasket etc. Do the math, (ther are some good books called "auto math hand book") I got mine at barne & noble.