Narrowed it to 2 TSP cams, don't know which?
 

I have an m6 98 Z with all supporting mods to include LS6 intake. I'm looking at getting the TSP 228R or the TSP 233/239 cam just looking for the best DD cam. Also do I have to get aftermarket injectors with either cam or is the factory injectors good enough, or do I have to get anything else besides the tune.

i vote for 233/239, with good tuneing it would be all good

Yes you need injectors.

I vote for your second choice

If you've done your research and have decided against a custom grind I'd say the 228. My opinion on cams is get one made for what you want. Its not that much more expensive and if you go with a good cam guy you get the best of both worlds.

i have the tseunami now and i love it 234/238 581/587 custom grind

Do I need injectors if so what size. Cuz another guy told me in the internal engine section that I wouldn't need injectors.

i have the t2 and love it and yes u need injectors 36 lbs should do the trick