Here is some information about the swap:
Porsche and Chevy V8s combined
I have converted both 928'S & 911's, with that said, all I can say is that it is the most cost effective way to get great performance potential. I'm sure we will agree that Chevrolet parts are available everywhere, and are inexpensive compared to 928 parts. The level of performance available is only limited by your imagination.
I certainly do respect and admire all the folks who have worked so hard to provide parts and ideas to improve the 928. I have owned several 928's continuously since 1980, and have a stock one as a daily driver.