You need to talk to the machine shop and tell them what you want from your motor. Since it's getting bored, you will have to replace the pistons. You should decide now what type of pistons, and more important, what compression ratio.
What heads are you running? If they are stock 350 small valve heads, you may be better off buying new heads rather than rebuilding those. If you want more power, consider the Vortec heads. They are fairly cheap, and create great hp/tq gains right out of the box. You will need a new manifold to go with them though.
Nows is the time to make these choices while you still can...
