D28 radius arms---- lower shock bolt?

[pimtool]

OK, I got some radius arms from a d28, extended them and now I need to know if there is a special bolt for the lower shock mount? Or can I just open up the hole a little and use a 1/2" bolt, a couple of washers and a lock nut. I have asked napa and they dont list one, but I figured you guys would know for sure. Thanks.
Maybe this should be int the suspension forum. If so I am sorry and could you move it for me . thanks.

 

[samsonitesamsonite]

any bolt that will fit in the shock will work i recomend a shoulder bolt.

 

[pimtool]

Thank You...