New Rear Diff, need recommendations...

Me and my buddy spent about 4 days swapping gears on his '66 C-10. It took about a dozen trips to Randy's Ring and Pinion (fortunately their distribution center is only 15 min away), and four big guys to torque the crush sleeve, but we got it done and it hasn't failed after a summer of driving. Given that we're 19, and have only been wrenching for a few years, you can probably do it.