Not knowing what model jeep or which engine you have doesn't make offering help very easy.
I can ascertain that the crank pulley is not an M38 or M38A1 pulley which may be why you cannot find any notches to go with the pointer tab.
I've looked for the usual places ( flywheel window, etc) but this is the only place I find.
If I understand your post here you are saying you looked in the timing window and saw no marks?
This is the early L134 timing window set-up found on the M38, CJ2A & CJ3A. Do you have this window?
If you do and you do not see the timing marks with #1 TDC try placing the 180 degree opposite (timing) cylinder at TDC. The flywheel can be installed two ways, 180 degrees apart.
If still no joy then you will have to get #1 TDC (ACCURATELY) and make TDC mark/notch in the pulley. By accurate I mean less then 1 degree of error. This can be done with a TDC meter (dial indicator) directly on the F134 engine and by using a wigler in conjunction with the dial indicator on the L134 engine. The only alternative on the L134 is to remove the head and take the dial indicator reading off the top of the piston.
Guessing or timing by ear is not a good way to go. Too much advance and you risk spark knock and burned thru pistons. Too far retarded and she'll tend to overheat. The smoothest or fastest idle is not 5 degree BTDC!
