Hi, yep, 115 and 136. I'm sure the box will fit one way or another, my 100q c4 is 175 and I take it the 30v is more powerful, 190-200? It'll bolt on no bother I think, looking at 7zap most of the 'notes' are for gear ratios, so that would make sense, 19 teeth on the fixed gear on mine, 18 teeth on yours, longer/higher ratio as it has more power maybe? Or is that backwards.. Lol. Who knows! Anyway will be in oxford one day soon to get that engine, it's a cracker by the sound of it, so may as well get the gearbox too, will PM regarding pickup.
sorry for delay so far.
Will have to set off at about 4am, to get there lunchtime, so will be sleeping at oxford services in the van on the way home I think.