99'z-28

Ok fellas I have a quick question, wat cam do I need to use with l92 heads and a ls3 intake I have a 228/228 113lsa in it now and I've heard I need like a 219/236 or something with a big split for theese heads, in also gonna be spraying a large shot on the car now with a 150 it only picks up 2 3 tenths and sometimes slows down, and it has plenty of nitrous and fuel going through the plate, thanx!