1966 GMC 2500 engine question

Discussion in '1960-1966' started by therrera, Mar 22, 2024.

  1. therrera

    therrera Member

    Mar 22, 2024
    Hello all,

    I am considering purchasing a 1966 GMC 2500 with a Gruman Aluminum body. It has a 305 v6 engine. I am considering converting it into a welding rig and use it for work. I remember reading how older engines relied on leaded gas to lubricate the valve guides and avoid pre-ignition. The switch to unleaded created a market for a lead gas additive to get around this problem. Is this a situation I need to consider today?

    Thanks for the input

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