The Topkick Rotor is Hub Centric and had the same ID as the front Brake drum. The Rotor has 12 bolt holes and the factory hub has 6, the holes lined up correctly. I used Grade 8, 7/16 x 20 Bolts and steel lock nuts with Red Lock Tight to secure the Rotor.

Please keep in mind that I have a '59 1.5 Ton, the hub may be smaller than a 2 Ton version. I used Rockauto.com for a research source, they have very detailed descriptions. BE SURE TO MEASURE EVERYTHING...
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20240507_190137.jpg (181.64 KB, 100 downloads)
TopKick Rotor
20240507_190201.jpg (186.95 KB, 100 downloads)
TopKick Rotor 2
20240507_192027.jpg (184.36 KB, 100 downloads)
TopKick Rotor 3
20240507_192709.jpg (171.86 KB, 99 downloads)
TopKick Rotor 4

~ Craig
1958 Viking 4400
"The Book of Thor"
Read the story in the DITY
1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane