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Message: [QUOTE="96F350KID, post: 1458598, member: 1608"] I don't know why anyone hasn't said anything yet but Job 1 6.4s have longer pushrods than job2+ trucks. They used 6.0 pushrods which measure 9.847 and the replacement rockers require 9.800 pushrods. Without doing the change with rockers you run the chance of having the valves hung open a bit OR jacking a lifter. The reason for the lifter failure is strictly due to the cam design. Replace all 16 pushrods and you can order the lifters from Ford as a "Guide Set" is what they call it. Cheaper than by themselves. Remember any Ford part has a 2 year warranty. So even though Mahle is cheaper they're warranty isn't the same. Usually all 6.4s except late 09 trucks need pushrods, rockers, and lifters. We always cringe when one comes to the shop because their is so much that goes wrong with them. Good luck! [/QUOTE]

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