It looks like Caterham is using this combination in the Academy cars. Does anybody know what modifications are required to fit the mazda 5 speed gearbox to the sigma engine?

Many thanks!

Based on the regs section 5.9.3 -

http://uk.caterhamcars.com/sites/default/files/content/uk/documents/2014_caterham_academy_championship_regulations_-_published_copy.pdf

And the info here on mazda gearbox ratios -

http://www.miata.net/garage/KnowYourCar/S8_Gears.html

Looks like a stock mk1/2 5 speed. I'd be interested to see how they fit the box (with integral bell housing) to the sigma (adaptor plate ?) and also what clutch they use as the splines are different to the standard ford one.

Will keep an eye out on this thread for info.