If it is enough to set the BleedBox you could set it using an Acrobat preflight that you can export and upload to FFCore.
Stefan
All of our digital workflows and our bindery programs assume a file will be sent with 0.0625" bleed on all sides. We will occasionally receive a file from a customer which has .125" bleed or more. When this happens, is there a way to keep the trim size as is, but reduce the size of the bleed so that if it is greater than 0.0625" in the supplied file, FFCore can only use 0.0625" of it? Would this be done in Resize Pages? Or a setting in Impose?