This isn't merely a question of increasing 30 KN per TF apart from the obvious issue of generating the kind of thrust within the same dimensions .
This is also about major redesigning to accommodate an extra LP / HP stage which in turn increases the weight of the newly realised TF which will obviously be more than the F-100. With it comes the extra burden of a changed CoG , followed by a change in Flight Control Laws etc .
For perspective have a look at the TFX project . That seems at least on paper a well thought out & well fleshed out project. Incidentally RoK will be developing their own indigenous TF too which should be analogous to the GE F-414 TF which they've deployed aboard the Boramae , with an output perhaps > 100 KN of the F-414 , to be around 110 -120 KN .
Hanwha Aerospace Co., South Korea’s top defense manufacturer, and Doosan Enerbility Co., a major local power plant builder, are set to develop engines fo
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Any casual observer wouldn't be convinced with the kind of explanations you're giving. Anyway all the best for your venture . I'm sure the world will be looking at it with great interest especially India now that Turkiye & Paxtan have officially announced joint production of the KAAN in the latter country which obviously makes them a production partner if not a development partner