Thanks everyone for the advice!
So, as far as the suspension goes, first thing I need to do is get is the powerflex bushes, got it.
I can see the B12 kit lowers the body by about 20mm, compared to the TI suspension. Comparing my measurements to Jabawok's, I see the TI is already about 15mm lower than my 2.2 JTS (non TI). So I should expect a 35mm drop in clearance. That seems a bit much, since I already have trouble going over small obstacles.
Is there a way to stiffen up the suspension, while avoiding this drop? Aside from the powerflex bushes, which I'm going to get anyway.
As for the breaks, I see the 330mm are only for the TI, 2.4 and 3.2. So I guess my 2.2 uses 305mm discs. I could only find 305mm Performance Friction pads on Autolusso. I don't think they go on my 2.2 JTS though, since it says they only work with Brembo callipers on 147, 156 and GTV.
Is there any way PF pads can be fitted on the 159 2.2JTS 305mm discs?
Or, if not, is there any way I can fit the 330mm discs and Brembo callipers on my 2.2 JTS? I'm guessing this would require some extensive modifications (as in costly).
Looking around on Alfisti, I found the EBC greenstuff pads that would work on 305mm discs. Anybody tried those? How would they compare to the PF pads?
Also, there are the Brembo GT Sport 305mm discs at a quite hefty €320/set - almost double the MTEC. Are they worth it?