Here's a link to my pal Thirsty1's kickass thread, including a quickie on the wheel building.
http://forums.sohc4.net/index.php?topic=127295.25Note one thing, in his second step he (MIS)says to start from the outside in - he means to say you start from the inside out.
Few other pointers:
These wheels are NOT cross-spoked, in other words, the left side of the rim laces to the left side of the hub.
There are two different spokes on these SOHC wheels, referring to inner and outer spokes. Inner means the spoke runs from the inside edge of the flange to the rim, and has a shorter neck. Outer means it runs from the outside edge of the flange to the rim, and it has a slightly longer neck so it will fit around that longer bend around the flange. This will make more sense when you start handling them and test fitting.
The protrusions in the rim need to face the same direction as the incoming spoke. IOW, if something doesn't make sense, it's wrong :-).
Do everything loosely, evenly, as you go. When you're threading your first set of spokes, just catch the threads one full revolution on the nipple, no more, and do it the same all the way around. Do the same with the following sets of spokes.
Go get yourself a tube of Permatex or similar copper anti seize and some cheapo acid brushes from an Autozone or something. Brush the threads of the spokes with a light even coat of the anti seize before you begin.
You should NOT have to bow or bend any spokes to get them into position if you're doing it right.
Once it's all the way laced, you can put the wheel (plus axle and spacers) into a swingarm clamped in a bench vise as Thirsty did to tighten and true it, and of course you're going to need a spoke wrench.
I sprung for a Tusk wheel balancing stand which worked great, Rocky Mountain ATV sells these.
Speaking of Rocky Mountain ATV, search YouTube for their videos. They are done using dirt bike wheels but still, very helpful.
Rear is a teeny bit harder than the front, only because you need to temporarily undo some of the inner spokes you just did to get some of the outers in position.
Go slow, be methodical and consistent, have fun, it's a satisfying project once you get into it.
Hope that all helps,
N.