apbmalibu,
I asked the same question a little while ago.
According to the Factory Assembly Manual (which I just received), there are 34 spotwelds along the front edge just behind the windshield. There are also numerous welds behind the dash to support brackets.
Would it be easier for you to weld in a patch panel (available from LMC, Chevy Duty, etc....) in, rather than remove the entire dash?
I'll probably end up replacing the entire thing because my '57 GMC cab is in much better shape than my '59 Chev. I'd like to complete it as a Chevy (parts are MUCH easier to find).
Good Luck!
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