Maverick / patrol missing

[Hodgy92maverick]

Hi guys I have a 92 Maverick tb42 carby that misses, the tacho jumps and the timing also jumps when being timed under timing light so far I have replaced.
New carby
Iridium plugs
10.5 eagle leads
Distributor cap
Distributor separator plate
Extended rotor button
Flamethrower 40000v 3 ohm coil
Reset tappets
Replaced distributor from patrolapart.
I was wondering if the electronic ignitions get faulty as it was allready in the car when I got it.Also replaced wiring around the coil. I'm running out of ideas. If anyone
If anyone h