I've seen a rear axle under a number of older rwd cadillacs, including the '73 hearse I used to have. The pinion is weirdly offset, and I've only seen that style axle under cadillacs. I can't seem to find any information on it when I've looked at various times previously. I'm assuming it's strong as hell given that it comes in heavy cars with big engines and doesn't seem to break very often. Do any of you guys know anything about it, size of ring gear, ratios, what it might be a derivative of?