when I sent my maverick shocks out to ct race works he suggested to always set preload ring by using a tape measure of the shock body to the lock ring to be same on front and the back shocks should match each other as well... the crossover up to a minimum to avoid spring lock.. measuring from the ground will give you a base line idea of clearance... can be too many variables like uneven ground,, low tire,, load ect... I had to reset my shock ride height first day.. measuring tube where treads are from top of ring to top or body front 6 1/2" rear 7 1/2" crossovers at 2 1/2" from top ring to top cross over.. this gave me 14" gc and straightened out the camber issue on the front...
this is my best common sense guess on a new set of springs.. as they sag I will have to make adjustment but gives me a starting point...
hope this helps.