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MY 78 LUV IS SCREWING UP when i turn it off and take out the key it stays started and wont shut off for like a min HELP ME

Stays started? Do you mean that the motor runs at a smooth idle or does it "diesel" (erratic chugging)? If it's running at a smooth idle, i would first look at the ignition switch. If it's erattic chugging, the timing is too far advanced. If the timing checks out to be set to factory specs, then you most likely have massive carbon buildup in the cylinders. The carbon will heat up to the point that it will ignite the fuel. So even without spark, the fuel mixture has a way to ignite.

If you could go into more detail, it would be easier to figure out whats wrong.

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Previous setup: 4.1 Buick V-6/TH 350
Current setup: 400 Small Block Chevy V-8/TH 350
9" ford rear end/short bed/blue
What do Water, Electricity and Humans have in common... They all travel the path of least resistance.

I would definately lookinto the timing.

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