Some thirty years ago I was chasing some parts to build an open wheeler racing car. I was directed to a guy named Geof Harris,(who lived at Fairy meadow, just near woolongong) who had obtained the total Lynx Engineering stock of Ralt parts.
   The big surprise was that Geoff was also a collector of Holden Grey special motors. I saw a Waggot (that had a porous head casting),a three piece speedway sandwich twin cam, a Dunstan rotary valve complete engine, which Geof fired up for me,the sound of this engine was unlike any I had heard in the past, it also had a unique fuel injection system, also designed by David Dunstan, I believe. He also had what he told me was the only unit made of the Tontala sports car headed twin cam engine.He also had more than one Repco head & one complete Repco in running order, complete with the twin downdraught weber compound carbs.
     Geof Harris was a Truckie, who hauled coal on the South coast, he lived on the East side of the then new freeway, his exact address I no longer have.
    It may also be of interest to the people interested in high powered Grey Holdens  to get in touch with Kingsley Hibbard, who used to race an FJ back in the early 1960,s, King's FJ had a unique engine that had Five GP or RN Amal Motor Cycle carbs, Yes I know that the three ports don't exactly allow for five cabs, It was said by one of his then crew that the engine also had a roller bearing C, shaft made as a foreign order at the Garden Island dockyard? Kingsley would never confirm this, even when he had had a little to much of the liquid joy.
    I do know that this engine made prodigious power (from the 3.250"bore) especially at the top end & Kingsly did rev the daylights out of that engine, I do believe that 8,000 was the red line??? He once said that 6300 was the period one just had to get over very quickly, apparently this was the revs that the Holden crank found to be critical??The Kingsly Holden did often beat the Repco headed version & I once saw this car beat the Twin Cam Waggot version of the Tasmanian? Ray Long.If my memory still serves me well a figure of 265 Hp was once quoted from this near 3litre engine, however I am sure that Kingsly would provide accurate figures today.Makes one wonder how those main bearing caps/webs stayed in place?
               This is all memory of a retired Engineer, who these days enjoys designing unusual engines, like 4 oh rotary valved,( running at half engine speed,) 2 stroke Skotch yoke, flat 6 cylinder, that runs very cold & uses very little fuel .That keeps the juices running & any one who thinks that through, will understand the fun one gets from doing something that others thought could not work.
Regards Jabenti.