Could be Col, here is quote from Big Pete from the "Australian Touring Car History", when refeering to the HO.
"It really did produce the 600-plus HP claimed for it. Pete Geoghegan remembers telling Mick Webb not to leave Waggot's until he had 550, but on that fateful day he rang Webb to check on progress, heard the engine had shown 530 & instructed Webb to leave immediately. Instead, Webb carried on - there were many variables, like injector position & trumpet lenght - & broke 600. The highest, Geoghegan recalls, would have been about 623. However, bearing troubles seemed incurable, and, one boozy night at Haberfield, the idea of dropping in a 302 was raised. It had immediate, & quite remarkable, reponse from Geoghegan. "I said, Yes, well at least a 302 has the right piston speed, and Mick looked at me and I looked at him and we started being serious".
Than again, he may have been refeering to the Mustang. Good read anyway..
"It really did produce the 600-plus HP claimed for it. Pete Geoghegan remembers telling Mick Webb not to leave Waggot's until he had 550, but on that fateful day he rang Webb to check on progress, heard the engine had shown 530 & instructed Webb to leave immediately. Instead, Webb carried on - there were many variables, like injector position & trumpet lenght - & broke 600. The highest, Geoghegan recalls, would have been about 623. However, bearing troubles seemed incurable, and, one boozy night at Haberfield, the idea of dropping in a 302 was raised. It had immediate, & quite remarkable, reponse from Geoghegan. "I said, Yes, well at least a 302 has the right piston speed, and Mick looked at me and I looked at him and we started being serious".
Than again, he may have been refeering to the Mustang. Good read anyway..