what has to be done to hock up a 70 wire harness to a 71 hash ps it is a ss dash and ss harness from npd. thanks

Use the "search" feature and find the several articles (usually by Elree Colby) that describe the wiring differences between these dashes. There seems to be a real difference between 71 and 72, but I cannot remember what the differences are between 70 and 71. Happy Searching.