Covered. Several times.
THe compression ratio is simply not worth it.
As soon as you start farting around with taking the engine apart, you may as well of payed for a DE for $1100 and sold the DET for $1800.
AND you come up trumps.
I suppose in some ways it even makes sence. GTST's are cheaper, and you get a better fuel pump, all the turbo bits (brkes, LSD, 'box etc.) and a couple of hungie to play with at the end.
Low comp NA and your getting the worst of both worlds. No power. No responce. So you would have to go DE conversion. On question left is:
Can you do it yourself and save on labour costs?