Thanks Seagull, a very informative reply... much appreciated.

Yes I have purchased a Walbro 255 LPH, I should receive it shortly and would probably put it right away once I receive it and I also believe it would be fine without tuning as many have claim.

Do you think I would also need upgraded Fuel Pressure Regulator and Fuel Rail? again my fried recommended this.

Thanks again mate for the info, much appreciated