The engine is a 205 block of a 2wd sierra cosworth, that I think is normal, but on the other hand when I got the sierra it had a L8 ECU, so I have no idea what stage it is. The only thing sure is I tried a standing start with a bloke that has a dealership bought 1st hand 2wd cosworth, and left him a good deal behind (with the sierra I bought). Also I now have a set of oz turismo on it!