seriously its an easy post............... my mate did this and it didnt work.
LPG conversions are documented and when done right they are fine as long as the chosen engine is capable of coping with the extra heat ( a bit like adding a turbo some can take it some just cant)
But they have to be done properly including a proper map (again just like adding a turbo )
In reality most lpg failures are due to poor installation and guess what... funnilly enough just like adding..............