My 81 concord 4dr, 258-auto has the standard 2.53 axle and is very peppy. no issues at all with this. Maybe you have a clogged converter, EGR valve, vacuum line isues or issues with the carb stepper motor , or some other issue. these? cars had plenty of power even in the base axles ration and i do not recall them being sluggish. the carbs were alwasy touchy though.? and those vacuum lines... UGH. A lazy knock sensor retarding timing too soon can be checked. FYI- Due to a recent tech bulletin from our corporate service department, Itry to use only shell gas which has the most amount of detergents over the governemnt's minimum requirment for fuel additives.? Also the AMC Serpentine belt equipped cars will have a water pump with reverse vanes on them as the pumps turns opposite, so you'd have to chekc that out and replace if you go to v belts, but I am not sure why the reason, supposedly serpentine belts were better, less drag and more efficient. regards. Ken. More new features than ever. Check out the new AOL Mail! ________________________________________________________________________ More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080128/c55a8ea1/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list