8-1/4 to 8-3/4

mikelbeck said
They've got cut-to-fit 7260, 7290 kits. Bolt-in 7260, 7290, 1350 kits. And lightweight kits.

What's the difference with the 7260, 7290 & 1350 kits? What's this "slip yoke" thing all about?

The 7260, 7290 & 1350 refer to U-joint size. The slip yoke is the end that goes into the trans, the 904 uses a smaller one than the 727/833.

If you're going to use large bolt pattern axles, you could use your backing plates and drums.