^ If it JUST happens to be the lifters, the LS7 lifters are the direct LS1 replacements and are off the shelf Comp Cams units. If the oil pressure is good, that is a valid point. My buddy's oil pressure was good, but dropped every once in a while. The o-ring wasn't pinched, just wasn't seated good enough in the pump.
IMO, I'd rather do the oil pump first. Easier than taking the heads off.
The O-ring problem we had wasn't starvation, it was aeration.
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