Jeep 4.0 Engines: How to Rebuild and Modify (Workbench How-to): Shepard, Larry: 9781613251386: Amazon.com: Books
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The "350HP" is the next step up the ladder to more performance out of your 4.0 based Jeep/AMC motor. This combo features a more aggressive cam profile to give that "Lopey/Rowdy" idle