Nissan stuff:
http://asavage.dyndns.org/nissan (MT-130 link is near the bottom)
It's got the IH part numbers for parts, and some really good line drawings for the exploded views. You can page through all (55) pages using that link, but here are samples of all the exploded views:
(click on any image for page with link to larger)
















Note the 5-ring pistons.