spring over axle. gives about 6 inches of lift but rides much smoother and flexes better. way more work to do it well.
there are shackles that will work with the narrow shackle hanger and the wide spring. they have a small offset to match the width at each end. you still need to change the solid end spring hanger though if you want the wider spring. 60 springs are a little longer i believe so have better flex than the 40 hence the suggestion even though the 60 is heavier. i have custom made (alcan) 60 springs that are flatter than stock to do my spring over so i don’t get crazy lift but i get the nice flexy spring. it’s pretty tall still compared to my other 40 with the OME springs
here’s the difference if you can make it out. blue is SOA
there are shackles that will work with the narrow shackle hanger and the wide spring. they have a small offset to match the width at each end. you still need to change the solid end spring hanger though if you want the wider spring. 60 springs are a little longer i believe so have better flex than the 40 hence the suggestion even though the 60 is heavier. i have custom made (alcan) 60 springs that are flatter than stock to do my spring over so i don’t get crazy lift but i get the nice flexy spring. it’s pretty tall still compared to my other 40 with the OME springs
here’s the difference if you can make it out. blue is SOA