Cam Motion has a form exactly like what J-Rod posted. You can sign up on their site, enter in all the info, and they'll spec out a cam for you in a couple days.

Keep in mind most cam selection software is still based on theoretical or empirical data and thats not always a substitute for R&D and actual testing. That's why I chose a cam from someone who is very familiar with the LS1, and that's been tested and has proven results. Several of the sponsors have done extensive cam testing and development to the nth degree. I'd speak to a couple of them before ever calling a cam grinder directly.