The 3.54 gears and carrier are the same as the Jeep CJ's.
Will others fit? Yes. Volvos, Aerostars, Just about any pre 86 Jeep Dana 30's. There are a couple more.
If it's a tooth count of 46-13, for 3.54 gears, it will most likely fit. The 39-11 tooth count, for 3.55 gears, won't work.
3.54 are usually listed as 46-13 and 3.55 are usually listed as the 39-11, but I've see both listed as either 3.54 or 3.55.
Dana 30 low ratio case 3.55 and Down. Dana 30 high ratio case 3.73 and Up.