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Message: [QUOTE="B.A.D Performance, post: 978754, member: 15363"] Ive ran a set of shimmed 910s for about 2 years on my daily driver. The truck blew a headgasket at 300k miles so I decided to rebuild the whole motor. Upon tear down I noticed valve to piston contact on 5 of the 8 pistons. All springs were shimmed to 1.750-1.760 and the valves still hit. My question is is there a better set up for valve springs that doesn't require custom machining of the cylinder head or that cost a ton of money? [/QUOTE]

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