Non-Porsche engine swaps?

[boardertj]

Is there much information available on non Porsche engine swaps for the boxster? For example many 914 owners have successfully swapped Subaru motors such as the ej205 and ej257. It seems to me that a swap of this nature would be much more cost effective than doing a 3.8 swap or a 3.4 swap with a TT kit. 450-500 whp is easily achievable with many smaller, turbo motors and the motor cost would be way less than the cost of a 3.8 or paying 20k for a twin turbo kit. I understand the fabrication for a swap would be very labor intensive and expensive but if it is being done on 914s I would think (correct me if I am wrong) it could be done in a similar fasion on a boxster.

Here is a list of motors I was considering for a high horsepower configuration.
ej207 (jdm subaru wrx sti)
ej257 (usdm STi)
ez30r (jdm legacy 6cyl non turbo)
Audi engines are another possibility but known for high maintence.
ls1?....


I know this idea probably wont go over big with many people but just wanted some feedback or thoughts from people who are more Porsche experienced than I am. Thanks.