I'm thinking of doing this. I have the PC5 and Autotune and think the big bore would be a nice addition.
For those of you who have installed the big bore yourselves, how difficult was it? I know my way around engines pretty well, but things like aligning the cams and timing chain are a little more difficult.
Along with this mod I will also look into porting and polishing the head (by others). Recommendations for a shop to do this part would be appreciated.