Pcd (thats number of bolts holes and the diameter of the circle they form in mm) needs to be 4x108, centre-bore (as the name suggests, the bore of the hole in the centre) needs to be 65.1. I think that ".+40" is probably the et or offset, the 306 takes 18-23 iirc so you'll need 20-25mm spacers. 15x6.5j is fine, almost the same as standard.
Edit: Fixed the centre bore number.
Edit: Fixed the centre bore number.