Hi Ian,
For your information, you would need to base your calculations on around 1500kg with driver / passenger.

It has no cage and is not seam welded, but features front strut brace and the Adrenaline chassis strengthening rails (similar to the Grp A build manual).

I have Ohlins 2-way suspension to go on the car and at the moment this has equivalent to 380lb springs front and rear (although this differs somewhat to what I am used to, as the spring lengths are different front to rear, which gives different rates and I have yet to see how this drives on the road, as they aren't fitted at present). I can give you the exact rates if this helps, as they are in kg per mm of deflection?

Any help or ideas you can throw my way would be greatly appreciated.