You will have to use about two stops smaller aperture on the 8x10 to equal the DOF of the 4x5 for equal angles of view. For example, old Kodak DOF charts give 44' to infinity at f/11 with a 152mm Ektar and 56' to infinity at f/22 with the 12" Ektar. To simplify the math for working without DOF charts, for fairly critical sharpness the hyperfocal distance is about 2000 times the apparent diameter of the aperture as viewed from the front of the lens. A 5" lens at f/32 on a 4x5 camera might satisfy the OP's requirements while a 12" lens on the 8x10 should yield sharp images from 22' to infinity at f/45.