Here is a list that I have assembled for the parts addressed during the two, separate maintenance services. I say separate, because the two services have almost no parts removals in common and the front end work is on 60,000 mile intervals on the 3.0L and 100,000 mile intervals on the 3.2L. The upper engine work for both should be performed on 60,000 mile intervals. You can add up the parts prices for yourself and see that the majority of the costs associated with these services is in the labor.
I. Top End Engine Work
(Only 1 and 2 are required, others as needed)
1) Valve gap check/adjustment
2) Spark plugs, 6 required
...Motorcraft AGSP32PP, FordPartsNetwork.com (FPN) $3.99 ea.
3) Plug wires
...3.0L Motorcraft WR-4033, FPN $83.99 (will fit the 3.2L)
...3.2L Motorcraft WRE-4081, FPN $134.99
4) Valve cover & plug well seals
...Fel-Pro VS50378R, AutoZone.com $71.99
5) Intake manifold gasket (2 req)
...Motorcraft E9DZ-9439-A, FordPartsOnline.com $12.14+s&h
6) Thermostat (only if needed)
...Motorcraft RT-1112, FPN $19.99 or FordPartsOnline.com $17.77
7) Oxygen sensors, 2 required (recommend replacement with spark plugs)
...3.0L Bosch 13942, AutoZone $33.99 ea.
...3.2L Bosch 13223, AutoZone $40.99 ea.
II. Front End Engine Work
(Only 1 and 2 are required, others as needed)
1) Timing belt
...3.0L & 3.2L Gates T248, RockAuto.com $32.82
2) Accessory belt(s)
...3.0L PS-WP, Gates K040500, RockAuto.com $10.48
...3.0L A/C-Alt, Gates K060445, RockAuto.com $11.41
...3.2L Gates K060854, RockAuto.com $20.58
3) Water Pump (rebuilt-lifetime warranty)
...3.0L A1 Cardone 57-1373, O’Reilly Auto Parts $61.45
...3.2L A1 Cardone 57-1458, O’Reilly Auto Parts $67.99
4) Lower radiator hose (if desired, not usually required)
...Motorcraft, FordPartsOnline.com $12.87
5) Crankshaft position sensor
...Wells SU242, AutoZone/AutoZone.com $42.99
6) Front main oil seal
...National 710220, O’Reilly $7.99