My work has set aside funds to buy shotgun racks for the new Ford PPVs that we have been getting as replacements for the Crown Vics. The shotguns are currently stored cased in trunks or rearmost SUV compartments. Our command staff likes the idea of the overhead rack attaching to the prisoner partition behind the driver. Does anyone have experience with particular brands, models, or this particular way of carrying the shotgun? Should the stock or the barrel face the driver's door? Our shotguns are 20" 870s with wood furniture and extended mag tubes. Thanks in advance and feel free to PM if you are more comfortable doing so.