That sounds about right. I used a 1 7/8" wrench on the nut, and 3'pipe wrench on the front pto shaft to remove the nut on mine. A 46mm wrench/socket or 1 13/16 wrench or socket were special orders here as well. I bought the crank case cover gasket, camshaft plug, new collar, o'ring, and lip seal. Used a sheet of paper gasket and made the gasket for the oil filter base. And permatex ultra black rtv for the inspection cover and throttle cover for the injection pump. No water pump on mine
I did replace the sealed bearings for the fan while I had the cover off. Bearings were hanging up and catching. Took the bearings over to a bearing shop and they had replacements in stock for $5 each
O'rings can be found in a master o'ring kit. Happened to have the proper ones at work
A pair of needle nose pliers with a 22° off set will be your best friend when it comes time to remove and reinstall the springs for the throttle and governor