I saw some of the first pics of SG's suspension...and he and I discussed it even in 2002 when he was still in discussion stage.
I have not taken a tape to it (yet!) but his seems to follow the general "75% rule" of design.
rear: uppers are ~30", lowers are ~40"....upper is triangulated, lower is splayed slightly. I'm working with similar numbers but gonna 1/4 elliptical instead. Vertical separation at the axle is in the 9" range, about 7" at the frame. His roll center and Instant center seem pretty good, but he does get a bit of wheel hop on steep climbs....controllable tho.
front: Y-type 4-link with a panhard. IMO, I'm not a fan, since on articulation it tends to want to "twist" the axle, but with the poly incorporated in there there is enuf give. I would have only Y'd side and left the other as a single lower for less resistance. It works well on flats and downhills, but tends to not flex as nice unloaded (uphills)
Mike's uses all heims, and tho I haven't looked, I suspect they are all QA-1 joints, 5/8" diameter hole, 3/4" thread. Strong and durable. $30 each at Jegs....16 on his rig I believe = ~$500 in heims....hehehe
The best reading source for suspension design is on pirate4x4.com...you can spend weeks there searching and learning, and there is always someone asking a question. locate the "god of suspension" thread - 20+ pages of information, some good, some crap, and start weeding those who know from those tho are full of it, and then follow their posts.
I've been researching for over a year, and now have a bare/cleaned rear housing on the garage floor with a pair of leaf packs laying next to it ready to be chopped. Tossing in 4 links and hanging springs is the easy part...understanding the calculations and having a basic idea of WHY the suspension will work is the hard part. You don't need to know the exact numbers, but need to understand the relation between everything.