hey guys i promise this isnt a stupid post lol ok so i got some extra money and i had a pretty bad hole in my stock flex pipe so i figured a good investment would be a new header and flex pipe, so i ordered both off ebay. so i almost got my stock mani/flex pipe off beside the 3 bolts hat conect the two together. so since everything else is good i was thinking since the 3 bolts are so rusted on could i drill them out???? i already tried pb blaster and there tooo bad any thing i can do guys?? thanks!