Please, help me with removing pass. exhaust manifold

[cfan10]

Can someone please tell me what I am doing wrong, pass side exhaust manifold is cracked. I've undone the bolts from the block, but the top has this square like bolts that will not budge with adjust wrench, also cannot get bolts loose that connect to the exhaust pipes using long 9/16 socket.
Is there a way to get this done without an impact gun? Thanks so much for advice.
Also, pass exhaust pipe is twisted under bed of truck now, I know because muffler is crooked.


85 swb
305 v8
Dual exhaust
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