After spending buckets on the suspension setup on my fg f6 manual ute, tramp was still horrible, went through 3 built CV's, even after re-valved bilstein shocks and super pro bushes nothing helped, especially the pedders lowered leafs which are garbage (snapped the centre pin and actually bent a whole leaf spring). I did a bit of research as I didn't want tramp rods and came across a half rebound leaf that sits at the top of the leaf pack from the centre bolt to the front eye to stop the leaf winding up. Called up around town for various quotes, bloke at bedders Moorabbin said it would never stop tramp (clueless), Moorabbin spring works were quite expensive, and finally got a reasonable quote from Damien at suspension city north Melbourne (great dude) so I went to the wreckers and picked up a set of kings leafs of a BA for $100 and Damien took care of the rest, around $500-600 from what I can remember and even gave me a discount off the original quote.
Anyway, tramp is now effectively ZERO, I can now use launch control, dump it in 2nd and it just lights the tyres up.
I have attached a picture of someone elses. http://media.turbosport.co.uk/2006/8/2006081612343345337.gif
I advise anyone with tramp issues to try this before spending buckets on other methods (like me)