I think there's an error.
In Curami's book, this car is featured on pag.71:
'...giungendo...secondo assoluto alla Como-Lieto Colle e sesto assoluto alla Mille Miglia del 1948.
Spinta probabilmente da un motore 6c 2300 d'anteguerra era,
invece, la vettura a telaio tubolare costruita da Gigi Platé e portata in corsa senza fortuna da Soprani alla Susa-Moncenisio del 1951, anno in cui tali vetture erano ormai surclassate dalle più leggere e potenti Ferrari e Maserati'
Using your translation, it should be:
'It also raced at the Como-Lieto Colle where it achieved a second place overall as well as competing in the 1948 Mille Miglia where it finished 6th. overall.
Possibly fitted with a prewar 6C 2300 engine,
instead , should be the tube-frame chassis car built by Gigi Platé that raced without luck with Soprani at the Susa-Moncenisio event in 1951 but was no opposition to the Ferraris and Maseratis.'
The second part of your text refers to his car:
http://www.autopuzzles.com/forum/index.php?topic=17839.msg175237#msg175237pictured on the book on page 72.