Haha good luck to ya, your gonna need some sort of fuel management and tuning, theres another 500-1k you didnt figure in. You say your using the GSR block to raise compression, did you not see my post about the compression ratio of this setup, its .2 points higher then a stock LS!!All I'm doing is putting a higher revving bottom end in so I don't have to buy rod bolts, bearings, high comp pistons, yada yada, pr4 ecu should be fine