I just found an engineering shop that did this sort of thing.

They re-set mine flat/straight with no load and also added another long leaf to increase the rate (just slightly shorter than the main leaf with care that it can't foul the eyes at any time).

Has worked well in my coupe racer since the mid 90s.

Resetting springs involves heating the springs to remove the 'spring' in the steel, then reshaping them to the new setting, followed by another heat treating to restore the 'spring' again.

There have been innumerable attempts at re-arreanging the spring stack, reversing one leaf etc. etc.
While this may affect the static ride height, it also alters the spring rate, often for the worse & also leaves the main spring leaf unsupported in some cases which means that the car is both unsafe & illegal.

If an unsupported, or inadequately supported main leaf breaks between the front anchor point & the axle the car can easily end up being 'rear steered' when that side moves backward, jamming the tyre against the wheel arch.
If this happens at speed, you're going to need a lot of toilet paper & possibly an ambulance.

The main leaf may not break only when going over a nasty bump either as it can develop a crack at the highest stress point. which slowly propogates & fails at any time without warning.

Resetting the rear leaf springs is really the only way to do it properly as the spring works should also stiffen up the spring rate while their at it to compensate for reduced suspension travel.

re-aranging is easy. Just unbolt, re-arange and bolt back together. Play around with combos to see what suits you best.

Resetting requires a huge oven like at susp shops to heat the metal up, move it then cool it... or something like that.

Are you after instructions on how to re-arrange your leaf pack to make the car lower, or do you want to know how to properly reset leaf springs?

can some one list step by step instructions to re set my leafsprings on a datsun 1200 ute.

list and number the steps by some1 that has done this succesfully before

i want to do this and would like to see the instructions and it would also be good for others in the future to read befor they attempt to do this

thanks