Robert,

Howdy ! Not sure if this will help out, but the 1970 part number for the negative cable for "Chrysler" with 8 cylinder eng, is 2983778 (#4 gauge, 23" long). And the positive cable 2983636 or 2983499 don't know why there are two different numbers for it. Again these are from the 70 parts book, hopefully someone out there has the 69 parts book and could confirm for you . . . good luck !

Cheers,

Mark