the steel 36-1 ring i had was affixed with 8 screws to the aluminium pulley, there was no adjustment possible and technically it doesn't matter anyway as you would be telling the ecu the offset when its set up.

however, in the case of an aftermarket 2wd type pulley with 4 lugs to run weber marelli, not only does the lug get used for timing but its also the TDC reference. in addition, there's virtually no-one who could do anything about it on a weber marelli ecu so if the lugs are in the worng place on one of those its a dissaster