does anyone know where to get transmission rebuild kits for the 83 zx 5-speeds. or just a source for replacement parts. any rebuild tips would also help. any easy mistakes to make? thanks!

About the only place I can think of for a rebuild kit would be Courtesy Nissan or try your local Nissan dealer. I don't think any of the aftermarket parts suppliers have kits, individual parts maybe, but most times they sell rebuilt transmissions. Although I think most have discontinued that. Or you could try your local or closest Z car club. Someone there may know of a place, or someone here may know.

Trans-Star in Atlanta sells rebuild kits for Z transmissions.