100 mm Nikasil Carrera II p+c

[Richie]

Yep, studpattern is different and it will be a lot of work to modify a T4-engine to the correct pattern.
Only the turbo pistons are flat as far as I know, all the others have domes of some sort.
You'll have to modify the head as well because the register for the 964 head (Carrera 2) is flat. The cilinder is probably too short to modify so it'll fit in the T4 head.
I've considered this modification as well and I have measured a set of 102mm barrels (3.8) but it turned out too much of a hassle for me. Maybe a futureproject??
By the way, the 102mm barrels are still for sale (not cheap though).

Cheers,

Richard