the forward spring hanger is already at width of the frame where it mounts now and is riveted in place...you can do as you wish but I have never found a need to change the spring format other than perch location to the donor axle for install. You can...graft an extension to the inner side of the frame and weld here to widen the forward mount and cut the inside up right and weld a upright a bit wide to the opening of the newer spring....keep in mind you want this to be an "L" and weld back to the original bracket cut and and also to the newly added extension with your holes aligned properly for the silent block. It is doable, considered this very thing myself but again, closer study did not prove it advantageous over stock springs. Now if perches to retrofit to the donor were an issue in source and cost...then it would deserve another look-see.....odds are your mind is already made up as to what you want to do and you are here to seek a blessing or maybe forgiveness....your car, you goals, your money....the mopar gods are in good spirits today...go forth with their blessings...