give burlen fuel services in salisbury a ring , they can tell you the needles you need.
I have deliberatly left mine with "weaker" needles only affecting above 3500 rpm to save fuel, as a landy rarely goes there
Fett if they can Suss it you will make me a very happy man!
Plenty of sheds out there bolted together to run ok not many that run well I don't want to fall into the doesn't it sound nice misfiring overfuelling heap of dog you usually get.
Its true an awful lot of v8s you see, particularly off roading, are just about keeping running!