I hate to dredge up an old thread, but that is what happens when you search. You find things that make you go Hmmmm.
So Tony, can you give a little more detail on this build? What was the base head and block, what did you have to do in order to run that boost besides "hanging a turbo on".
I have been looking for an L28et and I have a line on a couple, but nothing close. If I could run 10-14 PSi on the N42 block and head with proper fuel and spark management I would put my energy into that for now and wait for the turbo motor to come along later.