Been too busy with other things over there -- didn't see the Q. There's no difference. The 4.0L crank end is 0.30" shorter, but the 258 crank end is the same with V or serp belt. Even if the crank end was/is shorter, it won't matter. The balancer will still pull up on the crank correctly. The 258 serp balancer won't work for a 4.0L, and vice-versa, by the way. The outer ring (pulley) is the same, but reversed. 4.0L has about a 1/4" wide flat on the outside, 258 on the inside. The belt doesn't run on the flat, so it's 1/4" closer to the engine on the 4.0L. -------------- Date: Wed, 26 Mar 2008 18:30:56 -0700 (PDT) From: JOE FULTON <piper_pa20@xxxxxxxxxxx> I asked this on the AMC Forum and have not received a reply. Is there any difference in the front of the crankshaft between a 258 with a serpentine belt arrangement and a 258 with the v-belts? If so, what is the difference and will the serpentine belt fit a regular v-belt 258 and vice versa? -- Frank Swygert Publisher, "American Motors Cars" Magazine (AMC) For all AMC enthusiasts http://farna.home.att.net/AMC.html (free download available!) _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list