Brake rod length

Problem solved. As far as the knocking . when I pulled rotors of , I decided to retorque suspension bolts . I found some loose both sides. And for the pulsating brake , I talked
with A/Jforms great source of knowledge . Through his in put I switched rotors right to left , cleaned everything real well and changed pads to a set that I thought was bad but kept . No more puling no thumping, thanks A/J