Strokers and timing tabs

Ok here is a stupid question....but i have to ask.
Ever since my motor has been put together, i have a reading of over 16 degrees initial timing(yes i have the vacuum advance unplugged) So either my timing tab has moved, or a stock timing tab wont work with the stroke? i know it sounds dumb....but i am running out of ideas. And if my timing tab has moved....how the hell do i fix that? I would assume TDC the motor and adjust accordingly?

any input would be nice. And the motor runs great....this is very weird.

ps no the balancer has NOT slipped.

how do you know the balancer has not slip and the same tab i use for a396- 454--540--572-581 is the same one i have used on 632 if the damper is the same size the crank stroke has not one thing to do with the tab

Well i figured the stroke had nothing to do with it what so ever, but i am just racking my brain.
And come to think of it, your right. How would i know if the balancer has moved or not.

I just replaced the intake gaskets. Before i removed the Dist. i marked it so i wouldnt loose my timing position. I replaced the dist. back in the exact same spot. I went to light the car and she fired right up, no missing or poor running. But i noticed the car was running much fatter. There was a lot of black smoke, and the smell of raw fuel. Before this, the car never once smoked....well except for the rear mickies.

Anyway i went and shot the light at it, and it showed almost 18 initial timing hhhmmmm. So i went back and checked the carb over, all the settings seemed un-changed.
So now i am just sitting here scratching my head. Hell maybe from day one the balancer has been wrong.

every engine i bulid i check TDC and reset O on the tab i drill ahole in the tab so it will not get painted over or buy a hi rent one that you can set you need to find TDC and see it it hit on O