timing question

[shift_s14]

On the pully what mark is 0 deegres and if you know what mark is the proper one to be set at the right timing i think its suposed to be at 20 deegres thank you alot

[sw20>>s14]

second to the left is 0 or TDC and the last one to the right is KA base timing @ 20 degrees...each timing mark is an increment of 5...so...i hope you can munipulate the math there...