The first thing you need to do is establish the EXACT tdc of your engine. You will need a tool for this.
It is not uncommon to find the indicator misaligned with the TDC mark on the pulley. 4 degrees will make a huge difference
The holes in the standard sprocket will move the valve timing by 4 degrees.
The 8 hole works sprocket is 3degrees per hole.
L series are very sensitive to valve timing. Having your TDC mark set right is imperative.
Like building a house. If the foundation is not right the house will never be.
http://www.datsport.com/Camshaftspec.html
adz1600 check the back of your cam for a letter stamped on the cam.... It should be a B.
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"R.I.P. Baz. 29 April 2022. Thank you for all your contributions to the Datsun community over the years. You will be missed." - OZDAT