Whats the original bolt size and whats a good size to move up too? Can I drill out the sleeve a little larger or do I need to remove the sleeve all together or replace it with a thinner wall sleeve? I'm making my shackles 7" center to center on 3/8" flat stock (its 4" wide so I have to cut it in half /forums/images/graemlins/doah.gif) then tap and drill the holes. Here's the kicker! I'm making my front brackets to custom mount the 52" springs up front. I'd like to have all three sets of bolts the same size /forums/images/graemlins/thinking.gif Will this require a new frame bushing and sleeve? I'm thinking 9/16" grade 8 bolts. Is that right? /forums/images/graemlins/thinking.gif I'm making custom plates and starting to drill holes for the frame bolts and spring eyes, I started out with a 1/4" hole then went to 1/2" for my frame bolts and spring eye, what size should I stop drilling the spring eye at? 9/16"?