I wont be making any batches but will be buying front covers & headgasket which are the main pieces of this puzzle.
There are another 5-10 members also interested so Im in the same boat but helping out with the information online as he is a single index finger typist who would rather tinker in his shed than be online with us over-salivating datsun junkies.
They will be made by the man himself when he gets the time as there is a bit involved to get them spot on and although CNC would be the best way for now its laser of waterjet cut some plates up and combine them with drill, tapping, countersunk bolts, nuts, sanding and sealing for ready to use items.

In my enthusiasm I have found the Z series heads are an update to the B6 series engine and in doing so we have a choice of a newer head design with nicely angled ports and narrow combustion chamber design similar all up to a bike engine but with much better exhaust ports.

The smaller cam pulleys will alleviate some reciprocating weight from the whole assembly and shorter then length of belt required. This will allow a more compact final setup even when using these pulleys on an older B series head and help with designing a front cover that fits with more ease.

just some samples of what these pulleys look like in front of an A series.

Attach file:

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  cam gears difference.jpg (62.60 KB)


  B series pulley front A12.jpg (97.97 KB)


  Z pulley front A12.jpg (109.04 KB)


  B series pulley on A12.jpg (112.25 KB)


  Z series pulley on A12.jpg (114.03 KB)


  Z series cam & crank timing pulley.jpg (115.63 KB)


  pulley weights 60gsm less.jpg (90.08 KB)