OK Is this a New? or used frame? Either way I think you need to check with the seller and see what they recomend or had on the frame.
When you started by saying you had to drill the brake bridge I assumed you bought a older used road frame that had been lightly refurbished.
A few pics may help too.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk