You might have a drive.
to many current shops this is equal to an alien spaceship landing. Depending on what was changed or not, cottered cranks, maybe even Simplex plastic bodied derailleurs.

I would go to The Bicycle Stand in Long Beach.
might ask for Evan.

might try The Cyclesmiths in Ranchita Ca - San Diego county- as the crow flies probably closer but have not referenced travel time. Jim Allen is the proprietor.

these are rebuildable but take longer than a top tier bike of the era. Bottom line, if for yourself and has deep sentimental value, GO, if the goal is resale and recoup the investment. NO!