the oil pump is synchronized with the distributor by way of a shaft between the two. It's possible to misalign the shaft (oil thrower) between the two and get exact opposite timing. try removing the covers, align the timing marks and set at TDC, then align the shaft by moving the pump and the distributor together until they slide toward each other and fit flush against the engine. Reassemble and rotate the distributor to set the timing.
The same way you set the timing of any Z24 engine. The vehicle it is in makes no difference. Do you know how to use a timing gun.
on the right side of intake ,just below carb.
Yes but why would you want to? The KA24DE is superior to the Z24 in many ways
the firing order on nearly all 4 cyl engines and specifically the Nissan z24 is 1,3,4,2
0.008intake 0.009exhaust
1324
3 degrees
1342
1324
1989 Nissan/Datsun Truck D21 Truck 2WD 2.4L FI 4cyl The Spark Plug Gap.032 (In thousandths of an inch)
get a webber 32 36 carb.
check eBay for a86 Nissan truck service manual.