Adjustable cam pulley for early 1.5 engine.

Looking for a adjustable cam pully to fit my 1974 1.5 FH engine.

I have never touched the camshafts in these engine before, is there differances in cam keys ways, all the pulleys i find seem to be for 1.6 hydro cams?

https://www.vwheritage.com/wc109at10109401k-alloy-timing-gear-autotech-mk1-2-golf-8v-engines

kent of piper dont seem to list anything that isnt anything other than GTI either?



piper say "GOLF 1.6/1.8/2.0 8V & G60/AUDI 80 WITH KEYWAY SEPARATE FROM PULLEY"

I dont know if my 1.5 cam has a keyway separate from the cam?