i think its 7/16 bolt and bout 2 in. long? for the top (frame to coil spot) bolt the bottom (coil to trailering arm spot) bolt is 7/16 and bout 5-6 in. long? not positive on either but an educated guess without looking
Nate


Link to my photobucket for pics of my vehicles
http://s238.photobucket.com/albums/ff17/OldIronChevy/