What can i do

[red84blazer]

ok, i am installing a 2 inch body lift on my 84 k5 an i have all the bolts out except the very back 2, i even already have 4 of the lift blocks in the middle section of the truck, i grinded the head off the back to an jacked up the back of the truck an cut the square part of the bolt off an tried to nock it threw but it wont go threw, it is rusted to sumthin inbetween the frame rails, an i cant get the nut off the bottom an pull it out the top, is there anyway to get this out without dropin the gas tank?

thanks