i had my 413 converted to spoa. i used the same springs just add a leaf at the rear to resist axle wrap. torque bars will do. but that will be after you have done your spoa. longer brake lines, longer u-bolts, you will need longer shocks. make sure the drive shaft is aligned properly before welding ...

hi there, has anyone done a coil suspension conversion on a leaf spring samy? i'm trying to figure out parts that i will be needing. i hope some of you guys can help me in this project