OK, ....here's the way mine are set on the TwinStar....

....the one looks like about a half a turn out from flush, the other about
flush. I would guess....split the difference, and adjust it about 1/4 turn
out from flush. That should at least get you into the ball park.

Every engine is slightly different. The last time I ran this plane....it sounded
like only one engine was running....the synchro was perfect down to the
last rpm.

FBD.