Help

Hey all looking for info I have a 383 with edelbrock RPM heads with roller rockers 11.5 sec 1/4 mile car the rebuilt engine has approximately 82 passes on it.

Last time out the top end sounded a little bit noisey so I took it into engine builder he found one lifter that was opening at 40thou less than it should, he is now recomending that I replace the cam the lifters, the rocker balls and the valve springs. please note that the affected lifter has a dot size ware mark in it right in the center and it looks like the lifter was still rotating in the bore as it should.

Any thoughts