Using a Server PSU
Using a Xyratex DS850-3-002 850W Power Supply (also HS-PSU-850-AC-INT) as a 12V power supply.
Outputs 12V, 70A!
Datasheet, 701447.pdf, ds650_ds850_ds_1210814264-707988.pdf
Similar projects: Server Power Supply Modifications Rev.1.pdf, rc site, 2nd rc site.
Also, the circuit board can be grounded from the case, and two of these used in series to give 24V, 70A.
Connector: Amphenol FCI 51741-10002406CCLF