Bullitt wrote:
You cant bore a 1000 or 1100 out to 1275 cc, they have different bore centres or sumthing like that

You also will struggle to fit two twin choke webbers on a mini, ive personally never seen it done, even to fit a single sidedraught webber you have to muck around with the bulkhead as its too close.

You are wrong man people in NZ bore minis out to 1440, and if by a slight chance you are right about not being able to bore a mini to 1275, then you just get an engine from an Austin or MG 1300 which has bigger valves. You also take the 1300 gearbox which ways about twice a mini one so then you are able to develop power. Also you can fit twin sidedraft webbers on a mini as all the 140hp racing minis in NZ do have them. Sorry I meant front wheel discs from a honda city which is a very easy conversion to make.