The engine capacity should lead us to the Alfa Romeo Tipo 900 series from the 50ies.
They had 9495ccm and a 6 cylinder engine.
Maybe the seller was a bit unprecise with his 9300ccm.
I think the "workhorse" can also have been converted to a stationary engine later.
The engine was used in trucks and busses of the 900 series.
Btw, a pity that it's for pick up only
Best regards
Ciao Carlo
