:(i have purchased a gauge package ,imprinted circuit,and dash and ft light wiring harness from npd ,all new for my 70 chevelle. now i am having a problem with my ammeter,it is working inversed.i believe that maybe the wires in the plug cluster or ft light harness connector have been mixed up .has anyone had this problem before

I beleive this is a problem with the gauge itself. The aftermarket got it backwards. You can fix it by swapping the wires at the gauge connector or the bulkhead connector. Does not matter which one you do. Do the the one easiest for you to get to.