Easiest 727/904 rebuild thread...
This is the way I used the small block piece of C-shaped metal to push in the spring to release the snap ring to open up this 904 drum... This is a 4-5 year old picture from the first time I did a 904... There is a special tool you can buy that compresses this but this is the poor man's way of doing it especially for someone who's only going to do it a few times in their life...
I just did the 727 last year in the power wagon and it also had one spring loaded ground and one that was just very simple all you had to do is take a snap ring out. The 727 spring loaded one as they recall was quite a bit more simple but I'll get to that one of these times soon... I'll see if I can find a picture....
Also here's a picture of some of the parts spread out on a 4-ft x 2 ft sheet of plywood on some chairs. Again this is to debunk that I don't have enough room excuse... Again this is from a number of years ago this picture...