well ive tried taking my mani and cat off today to replace them with an ss mani and a decat. but i cant get the old cat off its support bracket the nuts are on there way to being sha**ed. or i need to get the bracket off the block which again the bolts are on there way to being sha**ed. also the awkward nut of the 4 that holds the turbo to the mani also on its way to being sha**ed. i need help desperatly. any advice?