First of all welcome to the dark side.....here have a cookie lol. Welcome to the family. As to a timing chains while most of the time they do not require replacement i guess a safe bet would to estimate around 150k miles. Although ive seen many v8 run for a long time without timing chains replaced. Its really up to you the owners. If you do replace it i would recommend oem chains and change the timing chain guides. The guides are plastic and they due break. Upgrade to the metal ones better. Im sure more people will chime in welcome and hope you grow with knowledge here as there is much here within this forum
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.