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If you plan to use an LS2 block like we did with the LS1 Edelbrock manifold and controller, be advised that you'll need to do a slight modification. The LS2 uses a 5-volt cam sensor, whereas the LS1/LS6 and LQ9 use a 12-volt cam sensor. Since the controller was originally designed to read the 12-volt sensor, you'll need to reverse the two outer wires to change the polarity. This works well, but by the time you read this, it'll already have been addressed.