They state in the artical,"no paper work", but the restorers believe it to be an original 396 Sports Car Conversion

And yes it has a 140 speedo, and larger sway bar. It then states they bought the correct 15" wheels for the resto.
You all should read the artical in question, In it there are some interesting statements about Camaro's in general that sound a little off. Such as " owner used correct headlight rings " The car looks to be a non Z 21 trim car, but the headlight rings have the chrome trim ring.
Also the car has the more rare type of " Installed Upside down Cowl Induction Seal ".
And this quoate from one of the pictures of the tail panel, " Some purists say Fathom Green big block cars had no flat black treatment on the talilamp panel, while others say only black cars did not have the treatment. "
Under another shot of the carb there is a # R4557 listed has the carb#
Anyway it is a nice looking Stripe delete SS. Enjoy the story, and be thankfull for all the knowledge here at rhe CRG.
Mike