Lots of them running around here on SoCal tracks.
yes, 2.7/3.2 crank into a 2.5 block with 2.7 pistons
but.. the 2.7 heads/intake is leaps/bounds better than the 2.5 stuff.
It works well 
Several cheater BoxsterSpec cars here in SoCal ran 2.7 bottom ends with 2.5 heads/intake.
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