156 1.6 Brake Modified

I have bought 166 3.0 V6 calipers and I'll mount them in my MK2 156 1.6 I have 18x8 rims (32 offset).what size of discs can I mount without any problem??I have looked 305x28, 310x28 , 330x32

305x28

I'm satisfied with my original brakes but I havr 18'' rims and original brakes look too small,so I bought 166 calipers however can change them. is there a caliper that I can mount 330x32 disc as a original alfa part??

The radial mounted GTA calipers as fitted from 2004 onwards to the GTA

305x28 discs still look small behind 18" rims, well thats what i think after fitting the brembo GT kit on mine

I have a disc with my old car, a Merc, that measures 12.6" in diameter. And I put a Mercedes brake dust shield on it that also helped improve the brakes' performance. The size matters if the fit isn't perfect so I prefered to buy kits since parts are fitted to other patrs.