REAL injector sizing, everyone's HP guesses

okay, who can tell me what injectors to use? I've read many different articles suggesting different sizes. I don't want to go to big, because I drive my car every day, and it has to have good driveability/idle. They must support a little more than 500 w/ forced induction. here's the mod list:

331 w/a little over 9:1 compression
AFR 185s
paxton novi 2000 with original equipment pulley


I assume this combo will net me 450 at the wheels on a mustang dyno w/ 8-10 lbs of boost. Any guessers what size injectors I'll need? how about hp guesses from guys with similar combos?

lowering boost?

well, I just got a killer deal on a brand new, polished novi 2000 kit. The pulley that comes with it is good for 8-10. I'm sticking with my stock cobra upper and lower (maybe the downs gt-40 upper). The cam is a comp s/c grind, 223-224 dur and 544-560 lift @050. I have all forged internals and dished pistons, but the 2 BOLT BLOCK, because I was a cheapskate. I am not really looking to put out much more than 500 flywheel because of this. I don't always agree with being "over-injected" because of the idling and drivability that comes with massive injectors. A tune is going to be on within days of having the blower on. I'm probably going to schedule the dyno date as soon as my injectors are on the way, and get it tuned by dallas mustang right away. I just wish there was a way to lower the boost from 8-10 until I got a four bolt block in. I've heard it's a bad idea to bring boost below the stock rated level. I'd be happy and secure with 500 flywheel. The block was really well prepared, and has the DSS main support system (whatever that's good for, maybe 1 hp over the stock 2 bolt block rating LOL)