Car - aw11 mr2
motor / part in question - 4age bigport crank pulley

problem - There are no timing marks on the crank pulley for some reason

personal situation (if applicable)- Just wondering what the best way is to set the timing when the marks on the crank pulley are missing. (yes i know what they look like and where they're supposed to be.)

The best way i have thought of is to turn the crank pulley until the mark on the intake cam lines up with the "edge of the baffle in the filler cap neck" when the oil cap is removed. This would be the TDC position which i could mark with whiteout on the crank pulley. Then can I just get my protractor out, cut a wedge of paper which subtends an angle of 10 degrees and then use that to mark the position at 10 degrees BTDC?

Thanks in advance