Because the HB Lightning and the HB D8 use the same front and rear diff bulkheads, and substantially the same center diffs, the Tekno V3 D8 kit would be easy to use. The Tekno kit gives you a new chassis plate and center CVDs, and the Lightning front and rear clips will bolt right to it. You may need some mods to the center diff mounts - probably have to use the D8 plastic parts. You'll also need the D8 front and rear plastic chassis braces, and the D8 plastic steering brace. The Lightning fr/rear pinion gears are ground down to a 5mm output shaft size, and I assume the Tekno CVDs were machined to fit these, but you could use D8 pinions or get the pinion output shaft on your Lightning pinions ground down to fit the smaller hole in the Tekno CVD. HB parts are cheap, and you wouldn't need many of them to get a Lightning V3. Have fun!
Gary - GMK Supply
Great products. Goofy names.