" From: Jesse <j2sax@xxxxxxxxx> " " I would take a look at your 390's secondary circuit to see if your " opening up while cruising and make some adjustments or even play with " your secondary jetting. another possibility is the power valve. your manifold vacuum at highway cruise may be below its closing threshold. you can get a variety of power valves, even 2-step ones. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com