first off i must say it has been a while since i have been on here and posted, a while back i was on and remember a little discussion on lean codes on 94-95 maybe higher sixers, i myself had these codes all the time and thought maybe it was a vaccum leak or maybe bad o2 sensors, well i finally really got into the diag on this and found that my maf sensor was causing it, actually found a bulitten on alldata, so if anyone ever gets the p0171-p0174 ( i believe) then dont overlook that damn maf.