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Our project LT1 383 fired right up, and after a brief break-in period was ready for Craig to work his magic on it. Since Craig is a master at this, it didn't take him long to dial in a baseline and make subtle moves that proved to maximize our engine's potential-all the while remaining safe. Craig claims that his tune-ups are not on the ragged edge. "I like to play it safe on the dyno," he explained. "That way we'll have an engine to put in the vehicle." And if it's anything like this one, remember to hold on.