944 front brembo caliper problem

[beet]

i´ve in my 77´ 1303 cabrio all porsche 944 brakes with a single piston calipers around 4 wheels. i´ve kerscher struts at front with 944T spindles.
The problem is when I go to put the black brembos at the front. in the rear, i only put some spacers to center the caliper in the disc, but in the front.... The Ate caliper mount holes are smaller than brembo´s holes!!!!! what can i do? i know that my spindles are from a 944T but i don´t know year... the disc is mount rear the hubs... i need help please.