Punto 75 throttle body on 1.1 Seicento

Hi, all!
I've heard of people swapping their 1.1 Seicento throttle body for the larger one from the Punto 75 with the help of an adapter plate and I have a couple of questions,

1) I have an SPI Seicento sporting, will the injector fit on top of the P75 throttle body?

2) If not, will I also need the P75 fuel injector and will it be a straight swap?

3) If it's not do-able, is it possible to bore out the existing throttle body and fit a larger plate, or fit an aftermarket one?

Thank you for sticking with me this long, and thanks for any advice!