What year is your 3.9, if it's a '92 or '93 you can get a Mopar SBEC
that's good for 10 hp and 13 lb-ft (I think). Also raises redline to
5200 according to Mopar. With mine I get better mileage than with the
stock SBEC which is enough to make up for the price difference between
regular and premium gas (required with the MP SBEC).
Larry, '92, 3.9, 4x4, 5 sp'd, LE
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