rightstuff big brake kit signature reviews????

[duvall408w]

Looking at getting brakes for 70 nova. I seen people say that they were installing or that the install was easy. I am wanting to here about how they are performing. The single piston in the rear is the only real draw back that i can c. I have email kore3 and there kit looks good also. There is a 400$ difference. The car is 98% street driven maybe a autocross or 2.I have wilwood draglite 10.75 kit on front now.would these be two small for what i want to do?