what is the cost to replace timing chain on 2001 Ford Explorer Sport Trac

need to rplace timing chain what is the cost

1 answer
if it is a 4.0 sohc the motor has to come out as the chain is on the rear of the motor.
labor is 15 hours
chains are 450 w/guides
the other 4.0 is the same with about 100 less in the parts.