I worked with @StigsBaldBrother to see if these would be a direct fit for the non GT350s a while back. Long story short, it does fit. The bumper bar is a completely different shape, which limits placement. It also requires a bit more cutting of the lower grill due to the bumper differences and it sits a bit low in the grill. This means the tow hook rests on the lower painted section of the bumper. Not a huge deal, but something to think about. With the current design, there really isn't any other way to mount this to work better on the non GT350s. I'm happy with the product, and that it fit at all. I'll hopefully never need it, but the peace of mind is very nice.
Crappy pictures:
This angle makes the trimmed grill look uneven but it's jut the angle.
Crappy pictures:
This angle makes the trimmed grill look uneven but it's jut the angle.