69 inches according to the info in Pirate4x4's Bible. Look under "GM front ends." I expect 1/2 ton and 3/4 ton front D44s have the same wms because the different hubs have the same wms offset for the rotor mounting surface and the rotors are the same thickness at the wms.
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.
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