Thanks Mike, but after reading what Pete said he's running on his sapphire, I thought that can't be right as he would be running less than standard on his car at the rear. Anyway... after alot of digging around I've found out that a 4x4 runs 140lb on front and 120lb on rear, also avo coilover springs are 300lb on front and 200lb on rear.

What I can't get my head round is... that would give a 115% increase on front and only 67% increase on rear.

Would make what Pete said about right as you feel your 175lb springs are too soft, so if they were up-rated applying the 115% increase on front that would make approx 258lb

Still not convinced though as everytime I see a sapphire either 2 or 4wd on full chat the back end always looks like it's only a few inches from hitting the road lol....