Most important is max power and torque figures, the wiki simply has the rated figures but has anyone actually had their car on a dyno and can verify.
Failing that we should be able to work backwards to get approximate figures if any finished conversions can provide:
- 0-60 time (or ideally 0 to a range of speeds)
- Mass of vehicle
- Final drive ratio
- Wheel size
- MG1 & MG2 or just MG2
- Low or high gear