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K30 should have a 60 frontOh yeah? I'll make an inquiry. Same truck ,same color,same condition,V8,4speed,205,14 bolt, K30 spec but 44 frt(?).
K20 may have had a 44, not sure
*edit
Until 77, both 3/4 and 1 ton used a d44. In late 77, they started using a d60 in the k30
In 78, the k20 started using a corporate 10 bolt
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