The white Rover lives!
Hydraulic gayness is now sorted. If anyone's interested (which is debateable, because I'm not) the Rover T-series (2.0l 16v turbo petrol) and L-series (2.0l 8v turbo diesel) installations in the 600 are nearly identical including the gearbox (although the ratios are different).
The replacement power steering pipe I got came from a good guy I use who sells on Ebay. He's been an absolute gem but this pipe came from the last Ti he broke for parts. It seems that the car he broke had already been modified/repaired though and the previous person had used PAS pipes from a diesel.
A quick check of my own 620 diesel and a conversation with John from Ebay established that the pipes out of the PAS pump are nearly the same on T and L series, but one has a male union and the other a female. The middle pipe is what's really different, with the petrol taking the 'low road' under the gearbox and the diesel taking the 'high road' over the gearbox, but both end in a female union onto a common pipe into the steering rack above the subframe by the firewall.
So, John sent me the middle PAS pipe from a diesel Rover and I routed it as per my diesel 620.
It's done (in the rain), it fits, it works. Woohoo.
Git of a job though - radiator, intercooler and a/c condensor out, alternator out... took a while
Still need a battery and new back discs and pads (rusted away under the pads whilst laid up for over a year outside), but that'll have to wait til next month as I'm skint now
