You might try contacting Mike Aaro at Unitek in Sweden. There is a link from the Turbobricks website (www.turbobricks.org). Feel free to write that I suggested you contact him. I think the cost would be something in the $1500 to $2000 range, but you may need more parts like pedal, flywheel, bell housing, and clutch assemblies that would increase the cost. Unitek can also supply a "built" M47 that is more of a direct fit and that can handle much more power than a stock M47. Of course, the old M46s can take a fair amount of power, but the OD needs to be updated to the latest type and even then additional pressure (using extra shims) may be necessary. And with any of these transmissions, a stronger than stock clutch should be used if power is increased more than about 25% over stock. And while you are at it, lighten the flywheel to about 15 pounds.

Philip Bradley