Yesterday I did a couple more things.
Got the ignition working again, thanks heaps to Subarino for your pointers on the phone mate. It pretty much was just 1 main ignition wire that had been bypassed into the immobiliser. Cut the immobiliser out and re-connected and everything works fine now. Still not enough juice in the car battery to kick the starter motor over but she should start next time I go up there.
A few days ago I picked up a pretty much brand new looking WRX turbo dump pipe (Thanks Matatak!). I've ditched the old 3" stainless one because of the clearance issues. The new dump pipe while it will now clear the steering knuckle properly, it will need to be heavily modified to thread past the lift frames.
Firstly I set about totally dismantling (munting) it with an angle grinder, separated out just the part with the turbo flange, discovered that some of the rest of the pipe from further down was pretty much already bent at the correct angle I needed, cut and re-cut and test fitted a fair bit, tacked it together, then welded it proper.
It sits nice and snug in between the body and the lift frames and will thread around the side of them rather than dip down underneath, giving maximum clearance - I don't want to be bashing it on things.
I will need to goto an exhaust shop and buy a few more bends and short lengths of pipe, and sort out a flange adaptor to step it back up to 3" where it will connect to the rest of the 3" stainless system after the Cat.
I will also need to make a hole and weld on a big nut for the O2 sensor to mount into.
I'll have to pick up some heat wrap for the dump pipe too. Now that all the Subaru shielding is missing it will probably get abit too hot for the clutch and brake master cylinders. It wasn't an issue with the 3" pipe with no shielding but I figure I may as-well do it anyway.