You might mockup the #1 rod/piston & get it at TDC & see if the crank snout keyway is at 1:30. other than that as said retard it 6 deg as needed. EDIT I'd see if both the sprocket dots are clocked the same in relation to tooth root position if you have another known good timing chain/gear set,same for the cam keyway or dowel pin (I ain't up on BB's) compared to another cam. all that is left is the clocking position of the lobes on the stick. moving (1) tooth is 15.6 deg on the crank (SB)