I just replaced the two on my 52 half ton, the neg to frame was 26 inch and the plus was 36 inches,,these were a little long but worked ok, some recommend 2 guage but I used 4, that is all that i COULD find, and that is what the truck had on it, I have owned the truck 7 yrs and the old cables had been on it a long time,,4 is what was on the truck....good luck...Fred

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