Bit of a mongrel yes, bought it as an NC30 with an NC35 engine

plus the chassis and a pile of parts from the NC35 the engine came from.

Rebuilt as an NC35 with a few NC30 bits.
NC35 motor, NC30 carbs/pickups/CDI, NC35 coils, Modified airbox/bellmouths/springs/jets
NC30 tacho in NC35 cases.
Possible it _may_ have NC30 gearbox but have no idea what is in the engine.
It is noticably quicker than the stock NC35 but not sure how much of that is that it is downgeared.
The frame has def been a race bike at some point (the 'OK' scruiting sticker you can just see in the above pic) so can only assume the engine has been too which is why I have no idea what (if anything) is in there.
No V5, its a PITA to keep one for a non-road bike, unknown mileage.
That's about what I thought for it given that a crashed NC35 with bent forks and no bodywork sold for ~850quid