1992 Other Nissan Models Engine Misfiring

My 1992 Nissan Patrol TB42S 6 cylinder gasolene carby engine is missing at idle and is also missing when I try to accelerate. I have replaced the sparkplugs, leads, distributor cap and changed the points system to pertronix ignitor.
My compression is good and I have a new coil on order. Timing has been checked okay
I will check it at night to see if I have any sparking under the hood around engine