Mild 360 stalls when I put it in gear.

This may be a stupid question. I dont have timing marks on the balancer, I just have the marks on the timing cover. How would I time that to 15* to 20*. I see my timing cover goes 10 0 10. I have the timing mark below the 10 on the bottom about an 1" or so. It that right? It runs smooth.

Thanks