go for the longest spring you can fit , this way you will get the poundage you require spread out over a long distance rather than being squashed into a short spring , i would recommend a good forrest setup for the road , but as above it depends on your damping rates as well , is yours 2wd or 4wd ?

what do you mainly do with it ? , road car / track car ?

for a good fat road i would say approx between 180lb to 280lb dependant on use and damper rates for the front (dependant on transmission) between 300lb and 400lb also dependant on use and damper rates

if youve got pukka bilsteins then if you take the insert out there will be a part number on it that you can get the rates from

hth

mark

p. my car has 180lb on the rear and croft was no problem and i dont run any anti-roll bars