thanks bash, my 410 still uses the original front drums
, just want to upgrade to discs
Are you thinking of upgrading to disks by swapping the whole axle assembly from the SJ410 to a Samurai housing? This wouldn't be that easy to accomplish (is not a direct bolt in) because the axle perches are not in the same location. Also the Samurai axle is wider than the SJ410 so you would have a difference there. Also, the gearing is different your SJ410 as 3.93 or 4.10 gears (if I recall correct) and the Samurai has 3.73. However, I believe though that you can interchange all of the outer hub assembly and spindle with the disk brakes from a Samurai to the SJ410 axle assembly.
Another option would be to find a complete set up from an '85 they had disk brakes.
Hope this helps... -Eric