MS3 cam?
or what are some of the better options of cams having stock heads?

You need headers before any real cam goes in.
Search around. I'd consider putting the stock MAF (singular) back on. You programmer will do you no good, you need a proper hands on dyno tune, HPTuners, LS1 edit, etc etc.
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Springs, retainers, pushrods, timing chain (good to do on a '99), may want to do oil pump. TUNE.
Definatly need a good dynotune as well. You can get a custom nitrous tune (less timing etc.) and step up to maby like a 100-150 wet shot.
I have the futral F14 in my car and love it. I also have big gears (4.11's) and i love it when the cam screams up top.


oh yeah 