Not clear on the purpose here. Anything can be done with enough time, inspiration and $$$. I assume this is going to be a stripped out race car that barely resembles a Boxster. Why use a Boxster chassis at all? I would think a purpose built tube frame designed around your powerplant would be simpler and a lot better in the long run.
** Porsche DME will be very unfriendly to the BMW motor.
** Boxster tub will be heavy and useless in a purpose built 700hp race car.
** A stretched frame Boxster will have few of the handling qualities of the original car.
** Tip transaxle will not survive your powerplant.
It might be cheaper to just buy a 997 cup car and go racing.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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