I have a KB 2.1 on my '03 Mach1. At only 8 psi it's dyno'd @ 440rwhp/400 tq. Take a look at my pics on my various photo sites.
The first KB sent to the guys who did my install was a huge KB designed for a Cobra! What a monster! Here's what it looked like in and outta the box when it arrived:
This was a HUGE piece of equipment, trust me! lol!
This is a pic of mine after the install...I guy at a local car show took this pic:
Mine was 'Professionally' installed by a performance shop here in Vancouver, Canada. Pretty expensive but well worth it. Probably the most expensive way to go, having a KB, but boy does it pull at the very low end. Totally different vehicle to drive. Yours will probably make 650 - 700 rwhp...no probs!
Good Luck,
Larry