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Old 02-05-2018, 10:14 AM   #3
68Stepbed
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Join Date: Mar 2005
Location: Sevierville,Tennessee
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Re: Looking for info on direct swap steering box innfo for my 70

73-78 truck boxes have the same 3/4" spline shaft, and Inverted Flare fittings. 79-81(or 82) have the larger 7/8" spline, but still have the IF fittings. 83-87 have the metric O-ring fittings and the 7/8" spline shaft. Some of these number may or may not be accurate, but enough to give you an idea on what to look for.

All the 73-87 boxes are variable ratio. The 69-72 boxes are direct ratio.
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68 C10 stepside, LS1/700R4, TCI Engineering suspension system
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