Dubyagee, that's a worthwhile effort if I can do it without removing the camshafts. The 4.2L V8 has single overhead cams, I'm pretty sure the cams block any access to the valve springs and keepers. I've replaced the umbrella valve stem oil seals on american V8 which were not SOHC, I've got the 14mm adapter to put in the spark plug hole and hook my shop air up to it.

Hit Man X, I'm reluctant to put $5k into the car. The tranny, rear differential, half shafts, etc. could all go at any time.

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Matt
Seattle, WA
87 420SEL
83 300D
69 Dodge Charger
64 GMC C10 truck