Well I have finally put a few hours into the Austin. It took 12 hours to remove the crankshaft and cam shaft which then allowed the cylinder block with head still attached to come off. I am going to cut the head off with an angle grinder. I can reach all bar 3 of the head studs with my 5 inch grinder and hope that I can force those 3 with a wedge. The main tools for this work have been angle grinder for rusted nuts, crowbar as a lever, engine hoist as every thing is heavy, a sledge hammer and plenty of WD40. This is actually a pretty sophisticated engine for over 100 years old. It has slipper bearings for the conrods made of steel set into a brass bed about 2 inches wide. The main bearings are also 2 inches wide except for the end main which is 4 inches wide. These are also slipper white metal bearings, not poured. The cam is rather rusted but I hope that the roller cam followers will allow for the roughness. The crank bearings are currently being soaked in phos acid and will have to be good enough I hope. A bit of grinding of the caps will allow them to be tightened down a bit as the bearings are held by the conrod and main bolts. All these are very thick possibly 1/4 inches, or more in the case of the big ends. The pistons are well rusted into the bores again I hope phos acid will release them but I think I will need to bore out the bores and re-sleeve and replace the pistons.
Also the front axle has had the bi pivot casing cut off so as the rust can be cleaned off the fore and aft pin and the right and left pivot pin will have to be drilled out. One new king pin will need to be made as the original is bent. Once the crank case is cleaned and de-rusted I will assemble the tractor, finish the radiator, and build the bonnets. At least then it can be displayed and so long as the bonnet isn't lifted no one will know the top half of the engine is still missing. Well at least until I can finish the repair.
Note the finished Mill in the background. I should follow that up in the other thread.