Jim, a 4.0L header will physically bolt up, but the center two ports are way out of line. you'll have to do some serious modifying of the flange and center tubes to get good flow. On the 258 the center two ports are siamesed, on the 4.0L they are 1/2" apart (1/2" between the tubes). -------------- Date: Tue, 5 Feb 2008 16:59:00 -0800 From: Jim Blair <carnuck@xxxxxxxxxxx> I'm about to play this game too. My '82 Spirit is getting a Renix 4.0L header along with the AW4, but I'm keeping the carb for the moment. I'll probably even do the Renix intake (with a carb adapter I just bought online) till I get a chance to do the EFI swap. -- 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