What method is everyone using to degree the cam? adjustable cam gear? drive sprocket key slots? how can I modify the parts myself?
Thanks,
Mongo

Everyone doesn't degree the cam. Nissan made the A-series parts to high specification and with the short very stout double-roller chain the factory cams line up.

With an aftermarket or reground cam, it should be checked.

Multi-key sprocket is the most popular way. Rollmaster used to sell one with nine adjustible keys in the crank sprocket



Multi-hole



The high-dollar fully adjustable sprocket works good too.
Pitroad and Tomei sold this kine

its a little tricky to do, i did it on my 383 in the Satellite / GTX




its a good way of understanding the setup when building but as DD said the A series lines up pretty well with the stock fixed keyways.

I made a positive stop for the piston to check the rotation which you'd need for the datsun motor as well.

Hint with Nissan Motorsport cams the checking clearance seems to be 20 thou, I arrived at that by changing clearances till I got the correct duration and then set the cam taking special care to make sure the Inlet valve closing point was correct as that has the most effect.

Closing point affects effective compression ratio and hence torque and overall performance it is by far the most important timing point in any engine, Some people use a simple but foolish method of setting cams with equal lift on number four cylinder do not do it that way as it will result in less power and a drop in torque, I did an L series that had been set up that way with a works 76 degree cam and after dialing it in to correct factory timing specs it came on the cam almost 700 RPM earlier than it did set up incorrectly, So it really is worth the effort to do correctly.