My Summit description says "Factory Overstock" which I believe was an over-run of GM parts and bore is Finished 3.780 which is 4.8 or 5.3 liter finished bore size depending on which crank you drop in it. Woops the Summit on line description says "Summit brand block" but finished bore "yes"
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1968 Chevelle LS6 (out of a 2005 CTSV) M6 Tmec Magnum.
2000 MY Base coupe Corvette M6 LS3 (out of a 2010 Camaro)
1999 Triple Black T/A not very stock.
1998 TransAm stock driver survivor.
Last edited by LS3torque; 01-05-2015 at 04:44 PM.
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