On your own [cracked] head be it.
To optimize the timing at any particular revs. [Around 2,000 is about right for road use.]
Connect an analogue hand-held rev counter; loosen distributor; start engine.
Adjust throttle stop to around 2,000 revs. Slowly advance the dizzy and you'll see the revs first increase, then level out, then drop as a misfire begins.
Gradually retard from there until you achieve the peak reading that you got on the way up. Retard it down another 50 revs, which usually requires quite a turn, then lock-up the dizzy there.
[And that hideous half-carb/half singlepoint injection unit with an electronic main jet was, thankfully, unique to that engine.]
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KIA Pride - 94 1324 Optimum ignition .. new