Kennyfishes

42inch, Center of one spring perch to the center of the other? How far from the plate should they be on each side?

Hello, so I’m looking for some guidance on a 8.25 swap. I’ve searched about every keyword on this Forum and can’t find anything in detail. what are the measurements on where my spring perches and shock mounts need to be? Or what’s the best method to find these measurements, I want to make sure I’m doing it right the first time. TIA