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There's a reason most people stop at 416. The stroke required for 427 is a little much for the stock LS3 block. It can and has been done but the 416 is much safer and easier on the engine.
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2010 Black 2SS/RS A6
Halltech CF 102 fed
GPI modded intake manifold
Bo (knows) White ported TB
Kooks LT's/ Dynomax VT
Pfadted (springs/sways)
Dyno tuned by Rhino and GPI
I once parallel parked a train.
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