If it was me I likely would replace the plug wires,dist. cap and rotor and call it maintenance
I've seen wires go much longer and I've seen them go less. At 50k IMO it's not a bad idea just for peace of mind. One more thing (if you haven't done it already) that gets neglected is the throttle body--it's a good idea to clean inside the bore and the blades periodically--mine gets done about once a year--that way it never gets REALLY NASTY. You may find it easier if it's never been cleaned to remove it for the first cleaning---throttle cleaner,some rags and a little time will work wonders. Ooops I've gotten long winded
Short answer---Yep I'd replace the wires and then some !
BTW... I bought AC Delco wires for my LT1 from "thepartsladi" on ebay a couple years ago--$60-70 if my memory is correct. Personally I'd steer clear of $20 plug wires--JMO but there's a lot of garbage on the market nowadays. Good Luck!