I have 3 sets, 2 like this one that fits a B18A1. I didnt notice it till today but the B18A1 top has the bolt holes in the same location, these are offset one lower than the other. The bottoms all seem to be the same.

 

is it possible that the bolt holes just look even in the car cuz the engine sits at a small angle?

 

Nope, the cover thats on currently on my B18A1, both bolt holes are in the second row of plastic. The other 2 have one in the 2nd and one in the 3rd. The B18's not in a car, its on a stand too.