i have a gasser 93 f250 4x4 and am savin up for a sas but i wanted to know if 99 f350 springs will fit it my springs are 3"wide

find someone with a 99 350 and measure the springs

They measure 3" wide also.
I have a set from a 2004 and they are longer than a 93 spring.
You might have to mess with the shackle location to make em work.

Fronts for your truck is 23-7/8 x 28-3/8

Fronts for a 99 is 27-1/2 x 28-1/8

thanks for the measurements