Just had both heads done and only have a few thousand miles on them until the 1988, Chevrolet 5.7 ltr. engine spun a bearing. Heads are off the engine and come complete with valves, springs and rocker arms...just torque them down, adjust the valve lash and you will have great compression.
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I can leak test them for you here to show you how well the valves seal against the seats. Call any local machine shop and you will see what a good deal this is.
Email me for more info please.