There's no reason to use the TF39 core for anything. It's ancient.
The F101 is ca. 31,000 pounds thrust (at sea level/static conditions).
Its derivative, the F110, is 29,000+. The next step up in thrust, the F136, already exists, with decades-newer technology in every component.
If in some alternate universe the TF39 core were used for a low bypass turbofan, I'd guess it would be in the 34-38,000 pound thrust class in afterburner.
Finally, please use the correct designations for these engines: F101, CFM56, TF39; no hyphen. A hyphen is used after the digits to designate subtype, such as CFM56-7, TF39-1C, or F110-129.
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