I have a fox body with manual brakes. 85 coupe, cheap drag car. The pedal effort to slow the car isn't any different than my DD '93 4 cylinder. You have to make sure to use the correct pedal because the power brake pedal has a different pedal ratio than manual brake pedal does. And of course make sure you have the correct master cylinder, calipers, and wheel cylinders--on mine, I converted it to 4 wheel discs, and the rear brakes are a cheap S-10 setup that some of the circle track guys use, but no parking brake. I wouldn't recommend using this setup. It's cheap and it's definitely inexpensive. It works ok but I don't care for it. Also needs GOOD pads, most of what you get at the parts store is not that. You might search the site. I forget the brand, have a set on my 4 cylinder car and it's a daylight and dark difference between those good pads and the cheap stuff that used to be on it. Same for the shoes on the back. MM had the shoes, only place I could find anything decent for us drum brake guys.