The louvered bonnet looks like one of the very limited run that I got done back in the '80s. One was on my 240Z V8, one on the Clive Standish Rover V8, one on the Paul ("Pud") Downs V8 conversion that was one of Luke's first creations using Chevy V8. The latter car was also a silver 2+2 and was sold, minus V8 and converted back to L6 a tear or so ago as a very rotten project car, but still with the bonnet in place...
Circumstantial evidence, but who knows? Not a samuri (SIC) in my opinion.
I was kinda hoping it would be this one...