Motor Mount Bolts

What size are the bolts that hold the motor mount to the engine block on the 5.0 engines? I need to get the correct size washers to shim the motor up just a tad.

I realize it's easy to check myself but I got the idea now and I'm out and not with the car. Wanna get washers when I'm out.

Are they 1/2" or 3/8"?

Follow up. I used 7/16 flat washers. 3 at each mount to engine block location. It raised the engine about 1/4". Just enough to bring the fan closer to the center of the shroud and avoid contact at the bottom.