bushings would fit properly if you use OEM bushings for the frame side of the shackle and the spring manufacturer's bushings on the spring side - Kurt at cruiseroutfitters sells the OEM size bushings
Saw 74HogGuy's bushing issue and after taking measurements I chucked them in my lathe and sliced 1/16" off. Should slide right in on the frame side. Left 8 for the spring side.