It will be interesting to see how it all works out,I haven't decided yet how I'm gonna do the fuel management when I turbo mine. First I was thinking of modding 91+ mpfi then I thought about megasquirt,but then I got to thinking I have a Ford SVO set up that I built for another project but didn't use so I may go hybrid.
Where are you gonna get pistons? I don't know of any aftermarket and a custom set runs around $500
Unless someone did an AX15 conversion that 2.5L has an AX5 hooked to it so you might look into an upgrade,I'm in the middle of gathering parts for my AX15 conversion.