How much nitrous?

Ok i just recently rebuilt the motor in my fox. My mods are as follows: speed pro forged pistons, bored .030 over, stock crank and rods, gtp heads w/ 1.94 intake and 1.54 exhaust valves, gt-40 upper and lower intake,full exhaust. Im planning on getting 24lb injectors and a 255lph fuel pump. With this setup how much nitrous(wet shot) would benefit me the most? How much can it take? How much power am i looking at? Suggestions?
 
well that is close to what I have but I have an f cam. and I put down what I have in my sig with a slipping clutch. I will have new numbers after I break in the clutch. The nitrous was with a 150 shot but the clutch didnt hold at all. and the second pull it read 100 hp cause the clutch was shot! LoL. but I would say with a 150 shot you should be close to me and I should be close to 415 rwhp and 500+ rwtq.