You don't tell us what is currently on the car. The Puma is so light that it does not take much to stop it in a hurry. I used stainless steel brake lines all around. The rears are Type 3 drums with wider shoes than typical Bug brakes. I assume yours has a swing axle transmission. If so one of the camber compensators would help. Many have lowered the front using good quality lowering spindles (avoid Empi). Try to avoid making the suspension much stiffer than it already is. The ride quality deteriorates quickly.