VHslow

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

TIA James

elias_799

iTrader: (8)

just get some 243 or 241's. you should be pretty happy with aether one of them.

02*C5

iTrader: (1)

Safe .0001 that helps some but usually you want the deck milled to match the cam specs

VHslow

I'm not looking to spend money on new heads right now, the 243's dont flow much more than the 317's and i can have them milled for $50

Sales4@Texas-Speed

iTrader: (4)

For a stock head I would not mill more than .020" off of them.