I just re-acclimated myself with your project, looking over your past two threads. This is very similar to what I hope to accomplish.
Not to hijack your thread, but...
Basically I will PROBABLY have a 86 951 motor, going into a 83 944. While I build the engine, I will still be driving my 944 with its NA engine. Once the engine is built, I will do the swap and sell my NA engine.
I am still unsure of what I might upgrade. The engine is a full longblock from oil pan to cam tower, including the head. Not included is the intake manifold, the turbo, the oil cooler, and wiring. I will definitely replace belts, just to be on the safe side. I know that used intakes can be found for cheap... unless I am talked into getting the upgraded Lindsey unit.
Turbos? I haven't even given much thought to this yet; I want to get the engine before I get into details.
The big hurdle for me might be the wiring harnesses. I know zip about electronics.
Great project, Alex. At least now I know it can be done. I'll point the finger at you as soon as the purists start screaming "JUST BUY A 951!"