Hi to the LPG fraternity

Ok, I got my car ready converted just under a year ago. Now I am working on getting a full service done, including filters and spark plugs. After that, I'm going to get the car checked over by an LPG service agent (filter/safety).

So, can I have some suggestions as to the "best" type, make of Spark Plugs I should be using ?

I have a 3.2 preface (not that I would think should make much of a difference compared to facelifts) and an auto box.

I can see "Iridium" plugs all over ebay, but am sure most of that and the price is "hype".

So, can you help with some useful replacement spark plug advice fellas ?

Cheers

Woody