An old and reliable answer from tencentlife:

"Before starting the engine, you should make a visible mark on your
pulley exactly 2" clockwise (CW) from the TDC U-notch. This will
denote 35degrees before top-dead-center (BTDC). This will be the
target timing when advance is all-in regardless of engine type."

On 5/26/17, John Rodgers <jrodgers113@gmail.com> wrote:
> Still having power problems. This morning I found the distributer clamp
> loose letting the distributor move. I thought setting the timing with my
> strobe and tightening the clamp would fix it,  but such is not the case. I
> would like to set that timing using the 30° 3000 rpm method but I NEED to
> know how to go about marking that pulley at 30°.  Any suggestions?
>
> Also, I'm still hunting for the source of the power loss. Ideas???
>
> John
>

-- 
It seems my TO-DO list is a FITO (faster-in-than-out)