I'm not sure you are going to have the flow you need for a front mounted auger. Be sure to check your available flow to the minimum requirements of the auger.
My 40hp L4060 barely has enough flow (12gpm if I recall, 15hp worth) for the smallest hydraulic SSQA auger. I struggle with a 12" auger at times.
Flow = speed. Pressure = torque. 8-12 gpm at 2500-3000 psi will run a hydraulic post auger just fine if the hydraulic motor is speced properly.
McMillen X975 Skid Steer, Skidsteer, Planetary Auger Drive Unit, 2" Hex Drive, 6-15 GPM, 24" Max diameter Auger