more rust issues

[servantsalesmen]

At it again with my 04 2500HD. This time I am trying to remove the drive shaft and the last bolt is locked up. I have tried PB blaster, freeze off, hammer and chisel. What else can I do?? This sucker is stuck badly! I wasn't sure about heat because of the aluminum shaft, don't want to damage it. Any ideas? Thanks in advance!

[Silverado4x4]

Last bolt on what? Carrier bearing, U joint clamp?

[servantsalesmen]

U joint clamp. Sorry I didn't specify!

[searay220]

Heat. I use MAP gas.