famous bob
mopar misfit
You don’t need to relocate the springs the full 3” to put them in the frame rails and do the mini tub for 18x10’s.
But you should get a 1/2” spring hanger/shackle offset and move the perches to 42” c-c.
I’ve got 18x9’s and 18x10’s on my Duster with a 68-70 b body rear with 275/35/18’s up front and 295/35/18’s our back. But I also have the 1/2” spring offset and I trimmed about a 1/2” off of the quarter lip to do it.
you like rubber band tires ?