360 pistons

I'm looking at buying a set of TRW-L2405 pistons for a pretty good price. They are forged but dished. I was going to zero-deck my motor anyways so I figure that will bump the compression back up some. But, would it raise it enough? I'm probally going to be using a set of 308 heads. I'm not sure what CC they are. I'm wanting to run a pretty good size cam(.520ish?) so I would need valve notches cut. Can most machine shops do this? I know hensley racing can and they aren't that far away. I would alot rather have forged pistons instead of KBs.