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  1. pduffyd

    Emissions Question

    Yeah I just bought one for my 75 C20. Hope this helps.
  2. pduffyd

    Chassis brace help

    Hi GTP51, From another Aussie, SE Melbourne, here is my front cross brace. On my 76 C20 2WD. Mine is all solid all bar the holes on the left for the Brake Prop Valve.
  3. pduffyd

    How to tell the difference between a 5700lb or 7500lb axle

    Found this You are right its the setup of the brakes, suspension and tyres, need them duals to get that 7500lb rating.
  4. pduffyd

    How to tell the difference between a 5700lb or 7500lb axle

    Well thanks for the info. I tried the heritage center, but because mine is a RHD export model there is no record, damn it! I tried Holden over here, but back then there was no real worry about tracking RPO codes on a work truck, cab chassis. So I guess im stuffed as far as getting the exact...
  5. pduffyd

    How to tell the difference between a 5700lb or 7500lb axle

    Hi Craig85, mine are the 13 x 2.5 drums, and the 2850 lb springs are the biggest for the 3/4 ton. There were 3 different spring I think 2000, 2600 and 2850, although they were all available for the 5700 axle? I just found a spec sheet online for C20 cab, extra cab, and crew cab. Also K20 and C30...
  6. pduffyd

    How to tell the difference between a 5700lb or 7500lb axle

    Hi Big Chip. Yeah I just cant find that info. If thats true great! My old truck was a cab chassis, 131.5" WB, just cant find an answer for sure. Thought it may have had a code stamped on the axle or something. Mine is an 8200 lb GVW, 2850lb G51 springs on the back with 13" x 2.5" drums.
  7. pduffyd

    How to tell the difference between a 5700lb or 7500lb axle

    Ok so how do you tell what rear axle you have on your 1975 C20 with out looking at build sheets, (mine are gone). It came with 5700 or 7500lb on the rear, so how do you know what you have? I know mine is 10.5" 14 bolt ff with 4:10 gears but i dont know if its a 5700 or 7500 rear.
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