To boost or not to boost??

[ks71z28]

Well, here is my dilema. When tracking my car, I was always put off by the lack of "modulation" and feel with my power brake set up. I have since gone to a C-5 corvette front and rear set up with EBC Yellow stuff pads, and 7/8" master, run as a manual brake system. So now my issue is the car just won't stop. I couldn't lock the brakes using both feet! the car weights 3500 lbs, and just plain may require some brake boosting.

1) is there a vacuum booster with an adjustable amount of assist?

2) I have never driven a hydroboost set up, is it like a vacuum booster, with poor feel and modulation?

3) Other options, bionic leg?

thanks

Keith