I'll research on what cam I need for my application, then I'm going to contact the cam company and see what compression ratio I need to get the best performance from the cam. If need be I'll ask the cam company about a custom grind cam.
With a 318 this is backwards. You don't have a lot of options when it comes to compression ratios without spending piles of money.
If your pockets are deep, then you can follow the usual protocols, and make a darn nice streeter. But it won't be budget friendly.