Unfortunately I don't have pictures of the cabin. I haven't actually been on the 76L in about two years, and at the time I didn't know what it was (and was back in row 38, and it was before EC was a thing, I think...), but I've been on many many many 76Us and 76Gs. I'm 5'10" and have a 34" inseam, and I have always had TONS of room at the bulkhead. The only downside to a middle section bulkhead on a 763 would be if the lavatories were at the front and on both sides of the cabin, like on the old 76G, and people would walk up their aisle, see a line, and then cross over the middle section to the other aisle if the line was shorter or the lav was unoccupied. But that's not an issue anymore, at least not on the 76L. You'll have ample legroom.

Keep in mind these aren't the 76L, but they should be comparable.

76G



76U