Make DeLorean succeed with the fewest possible changes

my comparison is to Lamborghini or Lotus, cannot envision them as a rival to the large car companies, surviving would be a feat.

my scenario is always for their first car(s) to be produced like a film, hire all the outside talent, engineers, assembly on a project basis. OTL, they were a success in a certain sense, there was a market of 4-5,000 per anum, it's just overhead beyond all reason, then production beyond all reason to try to sustain it sunk them.

the next vehicle(s) could/should have been restyled Isederas, which was plotted, using German engines and parts, gone way upmarket, assemble them at Delorean snowgrooming equipment plant in Utah.
 
As per the title, make the DeLorean car and/or company successful and solvent such that it still exists in 2001 with the fewest possible changes from OTL
It's a big change, but simple:

Have JZD be less of a con-artist, and have him actually build the car he promised, an inexpensive sportcar that gets good gas mileage.

OTL, it's called the Miata.
Just build that in 1979.
 
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