SB Timing chain indexing question

Bring #6 to TDC and see where #1 is... you might be surprised.

If you set one piston up at TDC, the piston 4 spaces away in the firing order will also be at TDC. One is on the start of the power stroke, the other is on the start of the intake cycle.

Just line up the dots. And if it's a multiple keyed sprocket, make sure you get the right ones lined up. Simple as that.