11#s ?

Ok I will try to keep this short, I have a 1989 gt, my mods are P-600b 3 core Intercooler, 3inch Pro-m ati Meter, for 42#s, 70mm throttle Body, Gt-40 upper and lower,edelbrock heads 10 degrees timing,adjustable fuel pressure regualtor,42#injectors 1.72roller rockers, stock cam 1 5/8ths Headers 2 1/2 H pipe flowmasters 255 walbro Intank.And also a custom chip burned by Pro-m to match meter and all mods listed. I had all of the above mods Except Pro-charger, 42#s and chip.I had 24# Injectors w/fmu and a 6# sn 92 paxton. I have finished the Install yesterday and tried the New combo with the 24# injectors/fmu and no chip and the car ran Great! But I experienced spark blow out. So last night I got a set of autolight 24s and installed the chip and new Injectors along with new plugs Gaped at .035. When I took it for a test drive, I got no spark blow out but the car does not feel as fast as Before even when the paxton was on it! I hooked up a boost gauge off the vacume tree and she is making 11#s! I dont get it is there something wrong? I dont hear any signs on running lean nor is it rich to the point I can smell it! I dont have any clues as what to do next, can someone Help? Perhaps I missed something? I Hope! It reads 11# but feels less than 6!Could it be the chip? In the event of all the road testing my H-pipe did disconnect from the muffler and it is rather lound but would this effect performance that much? I am just trying to tell you guys everything so you can help me figure this out Thanks in advance Frank.