And take the correct wrench (line if you can find one that big), some fire (MAP gas torch) and maybe some penetrant. Spray it and come back in a day. I tried pulling three different pipes from cars in a local yard; all here in the dry West. In every case my wrench douched the flange/pipe nut. It's also fun getting it off the manifold.
hopefully you'll have better luck.
hopefully you'll have better luck.
