2000NHRAFormula

My cam walked back and dug a 1/8 inch grove into my plate from the cam gear. The gear itself has wear on the back where it tried to pull the cam back forward. I am sure the gear was on strait and spun free when installed but it even hit the bolt heads for the cam plate with the gear....i an doing a total rebuild due to the amount of metal that went through the bottom end. Thanks for any ideas