The 1970 Cuda last year I did took just over 400 hours - start to finish.

When I get the car is was a painted but stripped shell. Nothing bolt on other than sheet metal was on it.
I did the dash,steering column , dynomat the interior, ( that alone took nearly 2 full days btw) And ALL the assy work as well as all the custom fab work to install a full aftermkt A/C system, Custom made ft sway bar brackets because the ones supplied with the aftermkt ft bar didn't fit the K frame . Custom made brackets to to mount the park brake system due to the frame connectors in the way , etc etc etc

Every single wire harness in it is brand new (even that created an issue to diag a wiper motor issue turned out to be 2 wires crossed in the main dash harness, like that can be planned for )
Engine was done, trans was done, rear axle was done.

etc etc etc .

Anyone who looks at a car and says they can give you an accurate estimate restoring old cars is feeding you a bunch of bs to get the job.

Ok, I'm done. gotta repair a firewall on a 1968 Charger today. And it has to look like it was never done

before