I went to lower my truck by changeing shackles but i could get out the top bolts on either shackle. I wound up grinding them off and beating them out. The bottoms came out fine. I think the bolts are metric but anyways i could find replacment bolts anywhere. I went to home depot and picked up 4 1/2 long 1/2 grade 8 bolts. These are a touch small then the one in there but i wanted to know if they should work ok and not break? if not who can get me the factory bolts?