Re: timing a 51 EAB flathead
My experience the bump is 4 btdc, but that could be the later motors. You need to set the initial timing first, you set the timing without the vacuum advance. Then plug it in. You can fine tune from there with the vacuum. Nice they included timing light marks on the later motors.
A chevy mechanical conversion can be a bit easier to deal with depending on carb, but the vacuum unit works great.
Last edited by Tinker; 10-28-2021 at 11:57 PM.
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