2bad for u ta

looking for some info how much power poeple are gaining with ms4 i have a 99 trans am with kooks long tubes off road y pipe borla no disc ls6 intake under drive pulleys 3600 stall full susp ram air every free mod u can get its a ram air car has a 228r cam double springs hardend push rods and and its been tuned it made 411rwhp i put about 15 000 miles on it and it broke a valve spring and destroyed the motor cracked the cyclinder wall so i got a low mile motor and starting over i put new rod bolts and freshed the bottom end i am going to use 853 stock heads so i guess what i need to know whats gonna be my best set up would be i am looking at the ms4 set up so let me know what u guys think looking for dyno numbers and any info that can help