Lifter Failure

Should I just run my new Engle Solid flat tappet cam and 25 to 30 year old Competition Cams lifters. Or have them resurfaced?
I also have 2 new-old Hydraulic Flat Cams and 25 to 30 years or so old lifters.
Guess I am asking trust old stuff or not.
I reface EVERY lifter I install, whether new out of the box or 40+ years old