Er, no. The Air Ministry, ever cheap and ill-informed, was dead set against handed engines because they didn't have a clue about the engineering involved, and simply assumed a left-handed engine would require 100% different parts to a right-handed engine, doubling the costs of spares.
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When Rolls Royce eventually designed handed version of the Merlin, they had to promise the Air Ministry that they would make the engines 95% common in parts. As it was, all they needed to do was add an extra idler gear cog to crankshaft when making the handed Merlin 133/134 for the de Havilland Hornet.