3pg timing question

[Nascarfastcar]

When rebuilding and removing/installing the pulsar plate I marked the original position and the plate and had timing marks near the pulsar where to realign the screw. You can see the marks on the picture at the top right. In the picture below you can see the alignment mark is probably at 3/4 of the slot and that's where I put it back at. I've noticed the manual and some people state to just center the screws in the center of the slots. I've also seen a few other images of other people who had similar timing marks as mine (looks to be advanced a bit?)
I've rebuild this engine a year ago but I'm experiencing what seems to be detonation at high rpms... Could this timing be to advanced? It's how it was from the factory it seems. The cart say for about 20 years before I took it apart and everything seemed to have never been touched.

[cart around]

I remember a discussion about this a while ago. Even though the book shows it as centered, I remember finding something about it being offset a little. I've always kept that in the memory banks.

I think that the centering on the 3pg is just a starting point.

[Nascarfastcar]

Originally Posted by cart around

I remember a discussion about this a while ago. Even though the book shows it as centered, I remember finding something about it being offset a little. I've always kept that in the memory banks.

I think that the centering on the 3pg is just a starting point.

I just found a picture of this engine (rusty one lol) and another 3pg I did years before. And they both have that offset timing... So I guess you go by the marks. Don't get the detonation problem at higher rpms. Could be the gas or the carbs leaned out.