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milling heads

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Old 10-15-2014, 03:11 PM
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Default milling heads
I have a '04 silverado VHO with a LQ9 6.0, The stock 317 heads are 72cc giving it a 10:1 compression ratio, I have to pull the heads off to get broken header bolts out, So while there off Does anyone know how much I can have milled off the heads without causing valve clearence issues?

The truck has a TSP 233/239 .598/.603 lift
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Old 10-15-2014, 03:19 PM
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Going to be super hard to know without measuring it's not just how much lift or how much milling the issue is valve events.
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