Just an aside. Mounting the wishbone ball that low will mess up the caster setting on the vehicle. You may have to "pie-cut" the wishbones to bring it back into spec. I have used a cheap magnetic "angle gauge" to determine an approximate setting.
You need to check the caster angle. Your set up looks like you will have way too much caster. Should be 4-6 degrees. Put an angle finder on your axle next to the kingpin.