that is the Z06 that was raced by Alvin Forsyth Chevrolet
Forsyth was a Chevy dealer from the Pittsburgh area and was in the Steel Cities region of the SCCA along with Gulf Oil’s Grady Davis and Don Yenko
The Yenko/Gulf Oil Corvette Racing team had two new 1963 Z06 Corvettes , one blue one white. Grady drove the blue one on the street sometimes but it was also raced
(attached a pic with PA licence plate)
all 3 of these Z06 Corvettes have been found and restored
here is the story on the Alvin Forsyth Chevrolet Z06 #81
https://www.corvetteblogger.com/2013...-corvette-z06/