[Patrick G]

JETG, your numbers are strong. Trying to compare runs from different dynos is always hit and miss. You might have gained more than you thought. You may have just been on a conservative dyno the second time around.

I would caution anyone with ported heads or mill heads to measure your piston to valve clearance before running a cam like a G6X3. I've measured a bunch of LS3s and I can tell you that you are at .080" P to V clearance with a 231 intake lobe on a 112 intake centerline. For every 2 degrees of duration increase, you will lose .006" of P to V. For every degree of advance in ICL, you lose .006" in P to V. A G6X3 is a 235 intake lobe with an ICL below 109. That means that the P to V clearance on the intake is less than .060". Not safe IMO. Then if you add milled heads or valves with less valve drop, you're really in trouble. This is why it pays to measure.