Dana 70

Why? You have a 70 available for cheap. You said so yourself. Are you afraid of the weight? Seriously, You will be removing over 90% of the weight difference by removing the huge drums, hubs and brakes. I mean really man, they are splittin hairs here talkin about weight. Get the 70. It is there now and cheap. A truck 60 requires the same work to get ready and I bet the weight difference is less than 20 pounds between bare housings.