ignition timing math question

[randy 77zt]

i put magnets in my flywheel with a degree wheel on the crank at 60btdc.got my car running but timing isnt what its supposed to be.with offset at 60 it runs about 35 atdc-not good.with offset at 30 it runs 5 atdc.this is with fixed angle set at 0 to get the ignition map out of the picture.want to get this problem solved before i turn the ignition map on again.i am having brain fade on this math stuff.i might try to check the magnet location with the ign led on the ecm.i know i punched index marks on the flywheel to match it to the crank.note -post edited-i fixed it.i inverted spark and it went to 25 btdc.the i set offset to 50 (while running )and noticed the tdc mark was about 2 off.reset to 52-now on the money.turned the ign map back on and the car runs real smooth thanks to moby's map.