rearend gears

When me and a friend finished putting a Ford 9 inch in his Camaro and had to break it in we did the same thing Kim said. But about after 100miles of that it gets on your nerves. We shut her down and took her for a ride on the interstate going about 50-60mph between 12-4 AM. To this date after almost 2 years of racing a 454 with a 8 71 blower making roughly 900hp he hasnt had trouble with it,but plenty with the powerglide in it.