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  1. J

    K20 8 lug to K10 6 lug

    Hey yall, I’ve got a 1978 K20 that I’m building into a mud drag truck. The best tires to run for that though are Interco Super Swamper TSL SX’s. And looking at their sizing and my rule book for my club that I race in, they don’t provide a 33” tire for a 16” rim. They have ones for a 15” and...
  2. Daelus

    C6500 Front Wheel Bearings

    Took possession of an older fire apparatus built on a C6500 today and noticed some pretty bad vibration approaching 50mph. Backing down to 45 smoothed everything out and I was able to make the two hour trip home without issue. This truck only shows 17000 on the odometer, and I have reason to...
  3. Zachbell89

    Bore size

    Does anyone know what the hub bore size is on a 79 gmc sierra grande 4x4?

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