Do I Need Mini Race Bypass Valve?

Hello everyone .. I am new so let me give you the specs on my car, currently in the process of rebuilding the motor with forged internals...

I have a 2003 GT, stock heads, stock cams, forged bottom end, off road x pipe, slp power flo cat back, frpp shorty headers, accufab 70mm tb/plenum, vortech SQ, AMF power pipe.

Currently the stock SQ pulley is on the blower, however when I am done with the motor upgrade I will be stepping up to a 3.33 or a 3.1 pulley I have no clue how much boost I will be making with either one of those? I've heard that the stock bypass will be good up to 15lbs. Will I be making more then 15lbs with those pullies? Really need the help. Thanks guys. :teeth:

According to people I talked to they reccomended a bigger and better valve with that much boost. Something like a Vortech mini racing or Mondo bypass valve. You can find one on Ebay for a good price.