Lack Of Power

Setting lash will probably improve idle and on road power. Fully warmed up engine gap at: 0.010” intake – 0.012” exhaust. Remember front three cylinders have valves EI, EI, EI, back three valve sequence changes to IE, IE, IE.

You can remove all plugs, and roll engine over with fan while pushing on fan belt to bring up each adjustment. You will discover that in a straight six valve adjustments can be made in pairs such as 1&6. Wiggle rockers when both I&E lifters are on back side (no lift) of cam rotation. This method requires only three rotations of crank to make all 12 lash adjustments.

A 170 stock engine won’t make a late sixties A body into a rocket ship, so don’t expect pavement pounding performance after adjusting lash. What you will feel is better throttle response, smoother idle, and higher rpm range.