need cam help

my car is a 98 camaro z28. 6speed, slp intake, flowmaster muffler
also is it worth the money to get a full catback exhaust instead of just the muffler like i have. thanks again.
A good start is to take a look at the master recipe for 500, Patrick G. He has switched and tested and replaced much more than my wife would ever allow. Take a look:
https://ls1tech.com/forums/member.php?u=210
I'm now putting on my flame resistant suit as this is typed.........

