Goku,
you're doing an amazing work. It's hard to believe that's a '72-scaled!
To add something to m.lacivita and Chris info, I can tell you that 258-6 is depicted probably on March-April 1941, when the 36° Stormo (108° and 109° Gruppo) was at its home base at Bologna for a period of rest after the duty tour against Malta. You can see the typical Po river valley landscape, where Bologna is. The cowlings weren't white, but yellow FS33655, which was officially applied in that period. In late Spring, the unit passed to AS role, but on SIAI S.84. It was back on S.79 later, when those aircraft proved unsatisfactory. So, the aircraft you mean was still in the bomber role.
Also, as my friend D520 stated, 253-5 wore the Alfa 128 engines. 104° Gruppo went to the Aegean on July 1942, with its aircraft painted in that way still in its home base at Pisa. The original Alfa 126 engines had gradually been replaced in the following months. But that's not the only modifications those aircraft had: in order to spare weight and increase operational range, in facts, by 1942 the AS Sparvieri dismantled the bomb aiming and release devices (that you have made in your model) and placed an additional fuel tank in the bomb bay, and an armour was placed behind each pilots' seat, plus other minor changes. So, unless you represent an early AS aircraft, you sadly should scrap and scratchbuild those details. Moreover, all AS aircraft had an aiming device for torpedo release, behind the middle of windscreen or offset to port, where's the first pilot seat.
Take a look to my article dealing Buscaglia's aircraft in this site for more details.
Of course, I think we all can answer to your question and info request.
Anyhow, again, an excellent work.
Stefano
