Well, no great results yet, as soon as we strapped the car down to the dyno we realised the slight overheating issue I have been having for a while was actually a blown head gasket. We did a carbon test on the cooling system and got a positive result for exhaust contamination. It looks like either a head rebuild or another engine is going in. It's very similar symptoms to what Gleeson's car is having, perhaps its a common issue/fault? I may look into the pathfinder cooling mod after all Cam.
With the boost at around 19psi it was flowing over 330kw still so there is good power there, at least 350 comfortably, perhaps more. Now to find an engine.
Alex, the 76 graph looked almost identical to the 71 graph, just at lower boost. Transient response is much better though, looks like a good turbo match for the engine.