Hey ! I'm back to work on my pedal box and my plans call for 1 1/2 inch holes for the master cylinders and 5/16 bolt holes with 2 1/4 spacing. But I have a girling and the bolt spacing is the same and the center hole only needs to be 1 3/8 . Willwoods are the same . Does the large hole need to be 1 1/2 to clear the master cyl with the rubber boot on.
