Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in.
But i forgot one thing before ..i belong to the Fmtuners group .. and they say some stations with "Digital" reek havoc on many older FM tuners.... so is the problem on most stations?
hope you can get the 62 purring like Steve's
73? don VA3DRL
don Root