When on the shop floor we used to get 45 min a side for Marina rear wheel bearings, an hour for the MGB. That's from the I.C.M.E. manual that most none manufacturer 'book' times come from and of course with a vehicle ramp and all the adapters, power tools and pullers. As an old f**t sitting on the floor with a trolley jack but still with the pullers I would agree 1.5 hrs a side is the max. Care to name and shame where this was done? I heard very recently of someone quoting 8 hrs at £55 +VAT (£525!!!!!!) to change a set of King Pins..........