the only numbers that matter are the 1P57
The JL is the region code for where the engine was built QM means china. Not sure on JL but it should not make any difference. a 1P57 is a 1P57 unless you have the 2 bolt valve cover. The two bolt valve covers are a whole different animal and hard to get upgrade parts for.
One other thing to look at if you havent already done it is get a cold air intake set up. You will have to rejet your carb but it lets the buggy breath so much better
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Where there is a red neck there is a way.
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