Absolutely no chance behind a pescara without a 15mm spacer, the caliper family is from alfa gtv and the 406 coupe and it's very wide, I got offered a load of these recently and they were very cheap with good quality pads included. The piston sizes are a little big for that size of disc which will make them a little grabby but go for it.
Same pad as a mk1 Leon cupra r
I don't like Ali caliper carriers at the best of times and the caliper is axial so that the carrier in effect repositions the fixing holes, I did something similar to get some diablo calipers on a mk4 tdi (don't ask.....) so If the carrier is a mild steel and nothing too brittle and your running a roomy rim such a TD 1.2 or some super leggys then happy days
Cheap consumables as well, think of it as a cheaper restricted slightly sub optimal and heavier NQSBBK.
The other problem is that the the caliper pad combo is configured for a 28mm wide disc and the 312 disc is serviceable down to 23.4mm so don't let the pads get too low lest thy pistons eject from thy caliper and smite thee.......
If you are regularly checking you car over and have some roomy rims then it's a cheap branded BBK