I had the same happen. I decided to do it all once . I had Chris at TurboKaft supply parts and machining. I did all the wrenching & tuning.
10k plus miles no leaks, no smoke, perfect leakdown - compression and I could not be happier.
I’ve been really busy so I have not gone to the next step – EFI – but car is brutally fast and reliable.
Do your self a favor, do it once , do it right.
http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/767012-forced-deal.html