I have a couple of surplus 'matching number' Aurelia B20 S4 engines for sale.
B20-3681 is completely disassembled and needs rebuilding. The heads and block have been lightly skimmed (leaving the engine number stamping on the block intact) and the stud holes in the block have been either helicoiled or had steel inserts fitted where necessary by Omicron. The bottom end is good.
B20-3687 was fully rebuilt about 20 years ago by Brian Collins of Weylock Automobiles with new rings, valves, springs etc and has not run since. A couple of years ago I took it completely apart to double check everything and I fitted new water tubes at this time.
Either engine can be supplied with ancillaries such as rebuilt water pump, fuel pump, dynamo, starter, carburettor (single Weber 40DC or full twin Nardi Weber 40DC set up ) etc and in the case of the first one I can supply either a good used or newly reprofiled 'fast road' camshaft with good used OE Lancia cam followers. I can also supply a set of good used OE Lancia cylinder head studs if required.