Chain...
belt
Chain.
It has a timing CHAIN
belt
The Ford 4.2 litre V6 engine has a timing CHAIN
The V6 engine in a 2004 Ford Mustang has a timing CHAIN
Timing chain
It has a timing CHAIN
timing CHAIN
it has a timing chain usually on the passenger side of the engine behind the alternator
It has a Timing Belt.
It has a timing chain that should last the life of the engine.