A Holden “grey” engine originally in 132ci and 138ci capacities. With “just a little” work done to it!That's an impressive 155CI inline 6!
A whole industry grew up around modifying the old grey for racing and especially speedway.
Phil Irving , who later designed the F1 Repco V8 engine out of the Olds 215ci for Jack Brabham’s 66&67 World Champ winning cars, designed a new head for the grey engine.
