Well, I am not a restoration shop. There is less chrome on a Kaiser/Fr yes. I assume the grille is stainless, not chrome in that comment. So basically bumpers, and $3,000 seems about right.
Any engine rebuild done properly is $3000 to $5000 but as I understand it, there are some KF specialists that might do it for less.
Ancillary engine bay stuff like a wiring harness ($2000, yes $2000) radiator ($500) pumps, brakes, exhaust, suspension = $5000.00 for parts and services, with YOU doing most of the work.
Have not started on body. Using this one as an example, sand, prime, smooth with filler, fix rust, more primer, lots of time, and finally two stage paint done by a specialist should be $5000 to $10,000.
Dash restoration, glass if needed, floor pan work, wheels and tires = $1000 to $2500.
Upholstery was very specific to KF's and we see generic work so often, and bemoan it. So getting original style upholstery and having a specialist install it, including package shelf, headliner and carpet = $5000 minimum.
Add it all up and a person is easily looking $30,000 for at most a $7000 to $10,000 car at most. The problem is, if you rebuild the mechanicals, do the body but leave the interior original, then that, or whatever you don't do, sticks out like a sore thumb and you aren't happy. It's all or nothing.