Modified vs unmodified caliper (back view)

Modified caliper (front view)

Fixture to spot the new mounting holes

Counter-boring the backside to accept spacers

Machining off the old mounting ears

Ditto :)

Machining fins off the front side of caliper to give extra wheel clearance on narrow body 911's & 914's

Finished inner half showing counter-bore and mounting spacer for proper caliper centering over rotor

Caliper half on left shows completed maching. One on right still has the original holes, showing the difference between the two.