[MBZ] '82 300CD driveline

[Luther Gulseth]

I need to replace the driveline support on my '82 300CD.  The instructions  
I have say to first loosen the nuts between the support and u-joint 2  
turns.  I don't have a wrench big enough for that.  What size do I need to  
borrow/steal/buy?  Any tips about replacing the support?  TIA all,
Luther

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Luther  KB5QHU
Alma, Ark
'83 300SD (happily running WVO/diesel mix)
'82 300CD (Slate grey, black MBTex, WVO/D mix)