There were Fiat 131s called "Volumetrico" which had the volumex blower but the installation looked different to the one in the photo of the car for sale. Original Fiat-Abarth Volumetrico engines look like this:
The engine in the car for sale doesn't seem to be from a Lancia as Lancias usually have
"Lancia" embossed on the cam covers. There's also no mention of the blower on the car's badging so I would guess that this is an aftermarket conversion.
But you are right that the distributor is on the wrong side and in fact the air intake is on the 'wrong' side of the engine. I think this is a Turbo conversion and not a volumex as the air intake is on the exhaust side with pipework going in front of the radiator (presumably via an intercooler) to what looks like a plenum chamber on top of the carburettor. Although the plenum chamber is to one side so it must have a custom manifold? Weird.... dazed and confused....
Sorry to hear you have the man flu. Wishing you a speedy recovery.