https://www.hoover.org/research/what-pinochet-did-chile
A starting point. My guess is balanced analysis of Pinochet will come from contemporaries at the Hoover Institution and U Chicago. Both were involved in righting the economy down there.
The best is “Out of the Ashes - Life, death, and transfiguration of democracy in Chile 1833-1988” by James
Whelan.
Out of print, exceptionally difficult to find. Got mine on e-bay five years ago for almost $300. Big book, 1000+ pages. Heavily annotated, primary sources.
Google the author.
Will lend to a responsible individual.