From what I have read about the early years of Mack in Australia, Cyril Anderson who ran a transport company and was part of importing and selling Mack Trucks in Australia in the early years, decided that batteries and electric starter motors were to unreliable to be used on trucks Australias conditions due to there not being many other vehicles around in you needed a jumpstart. He reasoning was that if it didnt start the first time that there were plenty of tyres that could be let down and transfered to the start tank. All this information is in a book about Leader trucks written by Rob Laurent who details Cyril Anderson and his moves from running a transport company to being the Australian Importer of Mack Trucks and finally developing his own brand of truck when he felt Mack werent supplying Australia with the truck configerations they needed. Its a pretty good read detailing the things that need to be down to convert from LH drive to RH drive from the A and B models to the mid 70's I think when he split with Mack to develop Leader Trucks.