Hi well I recently lowered an HK ute via having the leaves reset and the minimum here in SA for the rear is 54mm from the top of the bump stop to the body and 38mm at the front. At those heights the car sits just right , not too high not too low,so don't go any lower, and that is using the factory bump stops not something aftermarket or shaved down. You might consider using 2inch dropped stubs on the front which will then give you full suspension travel and normal factory alignment settings and you dont have to use shortened front shocks. The trade off is that dropped stubs cost more than aftermarket coils.A good idea would be to reset some other ht/g leaves in the rear and put your originals on the shelf, 2nd leaves are cheap to buy, just make sure they are ht/g as they have different spring eye bushes to hk.

A complete breakdown of the the different springs, they're factory specifications and the different standard ride heights are all in th HT Supplement Manual. The one with the maroon and yellow cover.

is that 54mm with a full tank. i'd say that would come into play.how much would that bring the height down???

yeah love the car sitting low tried 2 inch blocks in it last nite looks good which brings it down to about what you said on a empty tank.dropped the springs off today to be reset should have them back early next week.