Dont worry, scorpions take LONG to give birth and get VERY fat before "popping". Patience is a must with scorpions. This is my Parabuthus granulatus that is about 9-10 months gravid and imo still has about 2 months to go and just look at how fat she is: http://i531.photobucket.com/albums/d...
This has a 2 litre golf gti engine(the new model will have a Audi s3 engine) and the Ariel Atom(new one) has two Hyabusa engines mounted together so two different cars altogether. The best one in my mind would be the Caterham R500.