Here are some photos of my installation. It took a while, plus some mods to keep the inspector happy but I think its worth it, esp with the forth coming petrol prices rises.
The 2nd hand kit as received :
Now where do all these wires go ?
I started with cleaning and fitting the manifold. Once its on I could continue to use the car as normal.
Ready to fit, Watch out for the live terminal on the back of the starter :
Sliding the manifold nuts into place :
Connecting the vapouriser to the solenoid/filter. I initially got it wrong, the incoming LPG feed should go to the filter first. Easier to do this plumbing out here than in the engine compartment :
And in situ :
Here are the tank vent pipes. The feed pipe position was good, but the filler pipe position could have been better. :
The Feed out is via the hole already there :
The filler pipe is in the corner, difficult cause it got in the way of the tank straps :
Pipe run :

The inspector said the distance was now 150mm from exhaust so I added a heatshield

Beside suspension mtg, sleeved :
along the floor :
and into the engine bay via the front wing. I left a loop of pipe just in case ......
Then the filler pipework. I had to add a clip at the beginning and sleeve the pipe to filler later :
My tank didn't come with straps, so I made them from 40mm/2mm galvanised steel :

All wiring tucked into trunking ( spare vent hose), nice and neat, keeps the inspector happy. The ECU is on the bulkhead behind the power steering reservoir :
A close up of the injector wiring. I had to extend the loom to site the pressure switch under the power steering reservoir where there is an unused stud.
And lastly the changeover switch :
It would have been nice to go out and ordered everything new, but some don't have lots of funds.
Cost of installation :
2nd hand equipment £140 this included a cylinder tank I didn't use.
Vertical toroid, NOS from Tinsley tech £100
Sheet metal for straps £20
programming cable £20
new filler £20
odds and sods £25
Inspection £84
so total about £409.
Current prices around here are 108.9 for petrol, and 49.9 for LPG
Ken