Setting the timing

Posted by Steve On 2010/4/2 19:20:13

Re: 1951 Packard 200, 288 engine. The timing calls for 5 or 6 degrees BTDC. There is vacuum to the vacuum advance. Do I disconnect the vacuum line, set the timing then re-attach the line? Or, leave it connected when setting the timing? The vacuum appears to be "ported" vacuum not manifold vacuum.
Thanks for any answer.
Regards, Steve.......