8 3/4 diff numbers

triumphman said

What do the numbers mean on a 8 3/4 diff?

Mine shows 2070741
Also has an "X" on the left side near the top.
The diff came out of a 74 Scamp, with a 5.9 Magnum. It was street racer.

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The 741 housing uses a 1 3/8 diameter pinion shaft. Which is the smallest size Chrysler used for the 8 3/4. They put them behind /6, 273,318,340 and 383s back in the 60s.
741 has the X on the side. The 489 has a 9 on the side and the 742 has a 2 on the side. It's a quick way to identify them at a qlance.