I have just come across a great photo of the car at Teretonga 1970 in front of Brian Crosbie, Peter Kocis and Austin Prattley. Autonews Volume 3 number 14. I don't have a scanner, and don't want to let the mag go, but any suggestions for you to have this great one.
It must have been very early in Grady's ownership as the report says "Thomson has bought the car from Spinner Black. He bought it minus motor and installed the 350 mill from his brand new GTS350, shoved in a cam and side draught Webers (!) and has gone motor racing. "There's a lot of work to be done before I do any winning" "