91coMANche Posted December 4, 2010 Share Posted December 4, 2010 The 91 I have is blown out (see other thread). I want to replace it with another 4.0. I can find lots of 4.0's newer than 1991. Other than the pilot bushing, will a later engine from a manual or automatic bolt into my 91 AX-15? Will the engine from say a 96-98 ZJ work? 97-98 TJ? 97-98 XJ? Does auto or manual matter? I want to keep using my 1991 fuel system and intake/exhaust manifold. Quote Link to comment Share on other sites More sharing options...
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