Maximum Tire Diameter, help please?

[BHP]

I am planning on installing 18" fronts/19" rears, wheels on my C5. I am using tires that will be 1.2" taller in diameter than stock with these wheels (27" front, 28" rear).

Car has Z51 suspension and is not lowered.

1. Will there be enough clearance to prevent body contact on maximum suspension travel?

2. Will the front tires clear the frame?

Perhaps someone could measure to see is there is enough room.

Thanks a bunch!