You need a smaller master cylinder or larger slave cylinder.

Okay slow going with uni and work, but today I pulled the engine out (for the 10th time) after measuring up mounts, this is how I am planning on reinforcing where the front mount will be. What are peoples thoughts?
 


 
 
Its 2mm thick plate

Its been a while but since being on holidays I've had a little free time. Adapter plate is now fully done, also finished off welding the driveshaft mount that I have been working on for a while. Next in line is finishing off the engine mount, then it will be ready for plumbing!

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Nice, good to see the progress coming along with this swap

Ok folks, I am now the proud owner of this wonderful machine and thought I would post an update.
 
This F20C powered SW20 is now rocking a set of late model turbo SW20 brakes and 1 inch master cylinder on the standard booster (will upgrade boosters at some time).  It has an APEXI AFC-NEO (signal highacker) to smooth out the fuel curve, unfortunately it doesn't modify the timing so it's not really giving a noticeable power increase but one day when the $$$ permit I will upgrade computers.
 
I have modified the exhaust and it flows much better but mostly to make the car sound better, and it sounds fantastic now!
 
After a fairly recent track event at Queensland Raceway the clutch plate literally disintegrated so I have had NPC build a custom clutch to suit this setup, with a new S54 box and helical LSD.  Sadly it is still a 3.9 diff ratio which doesn't suit this engine at all, but fingers crossed there may be an improvement on the horizon.
 
Still working on some maintenance issues, but am almost there.
 
Queensland Raceway Clubman Circuit - 1:09.0643