I have a 2001 Nissan Xterra six lug axle on my "50. It is the correct width, 6 lug Chevy bolt pattern, and Limited slip. The only issue is the ratio at 4.64, but my T-5 overdrive transmission works very nicely with it. Later Xterra have ratios in the low "3's" but come with disc brakes.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission