Sounds like a lot of effort to make it look like another car? Do you have a sedan or a ute?

I think people have done the four light thing but it leaves a fairly small space for the grill and it ends up looking like it has its eyes too close together.

Perhaps you need to identify exactly what it is you like about the 1600 features and work those styles or features into your car rather than trying to do a straight swap of parts and panels. You will hav difficulty aligning the style lines and fitting the bonnets, easier to say than do I think.

What is it about the 1200 front that looks tame? There are the GL/GX option grilles and bonnets that definitely give more feature. Boxy air dams also help to bulk it up a bit..... Depends what you like really.