Weird issue truck accelerates faster at half throttle??

[INSIDIOUS '86]

Originally Posted by yellow400ex05

well i adjusted and fine tuned the mixture screws and it seems much better, still rich but no leaving black marks on the pavement as of now i and a buddy of mine realized that my harmonic balancer is spun and using a timing light to adjust timing would prove to be entirely inaccurate.

also my plug wires are ancient and only 7mm wires, which may not be enough of spark either to help burn the fuel efficiently. what size wire is good for a BBC? 8mm or 8.5mm? i have HEI ignition as well.

The size of the wire is really only based off the insulation thickness. Inside most plug wires are the same. A set of tailors will be fine.