What type of LPG system to fit P38?

Hi Guys,
I sold my 02 P38 a couple of weeks ago due to ill health (Not getting to use it much) and it was the sorryest thing I have done :doh:
So now thinking of a 2000 4.0 hse with 133K on clock.
My question is...... What type of LPG system is best for these, Not sure what I had on my old one ( but it never had holes drilled into the top plenum pipes and was fitted by AG autogas).
How much would a system cost to fit, also do you think 133K is too much to now fit lpg?

Oh.......... not sure if the new RR is a Gems or Thor engine, would this effect the price? old car had a thor in it!

a 2000 will have a thor engine and the best solution is a multipoint system installation anything from 1500 to 2500 depends where you are tank selected etc do a search on here someone had a system done in Wales cheap and reported that the service was great as for miles depends on the condition of the engine for me 133 would be too much

probably work out cheaper for you to buy my 2002 already converted... I'm only an hour from you if were interested !!!