New Brakes....No Stopping Power....help please

[| 1990 ZR-1 |]

I just finished a full brake overhaul with new rotors, new Hawk HPS Pads, braided stainless steel brake lines, and flushed the fluid with Synthetic fluid. Dark brown gunk came out with little rust pieces especailly out of the front calipers. I did go through two botlles of fluid just to make sure all the crap was out. I managed to get air into the master cylinder, which I bench bled the get the air out of it nad properly bled all four corners again (RR, RL, FR, FL). I also went through the proper procedure of bedding the pads, but after all this, I still have a somewhat soft pedal feel with long travel. I'm not really sure if this how the brakes on the ZR-1 suppose to perform since it's my first corvette, but they feel unsafe. The car brakes and stops, but does so with a huge effort, and the ABS does not kick in. It feels like the brakes do not match the power of the car. I' afraid to accelarate too fast in trafic in case I have to stop suddenly. I try to keep a safer distnace than normal so I don't rear end any one. It just doesn't seem normal. My only conclussion is there's either something wrong with the master cylinder or the brake booster, or both. How would I check if either one or both are bad?? They seem to be verry expensive to replace. There's no air hissing sound coming out of the brake booster.Does that mean it's okay? is there anything else I need to check?

Thanks in advance guys!

On a side note, I also finished installing the FX3 suspenssion and it works flawlessly!!