Deni,
I have made some measurements: the line on the green tape marks the centre of the metal frame and the orange tape shows the distance from the centre of the frame to the edge of the bonnet opening; as you can see, there is 50mm difference. That said, the centre of the radiator (also marked in orange) is not far off the centre of the frame, leading me to think that the opening is off centre, which I can live with!
Body alignment.jpg
The other useful thing to check is that the front edge of the wheel arches actually tuck around the front chassis 'horns' quite well on each side and I think this will be a useful body mounting point...
Front chassis fitting.jpg
Hope that helps...
Richard