Hey Bomo: You absolutely must start at the radiator and work back. Be very careful and acturate with your fitting,as you move back,and always check left to right at each move,also. If the new body is a different style or model,it is extremely important to do this. Work slowly, don't be in a rush, check every move you make, twice, and in the end, the results will be well worth it,with a beautifully finished job,this is how a professional shop does it. As far as drilling the hole for the steering,you'll have to determine that from BOTH sides of the firewall,the floorpan and dashboard. The first is from the engine side,from the steering box straight back to the firewall,or floorpan, depending on the angle and the height then go inside and mount the column support bracket to the dash and determine the same,once again,measure and drill carefully. Good luck.
SPIN