 The new operation was initially successful . In Formula One , March cars won three of their first four races . One of these was a world championship race , the 1970 Spanish Grand Prix , won by reigning world champion Jackie Stewart in a customer car run by Tyrrell Racing . As a result , March finished third in the 1970 Constructors ' Championship . The factory also sold 40 cars to customers in various lower formulae . Despite these successes , the organisation got into financial difficulty almost immediately . The Formula One operation was costing more than the customer car business was making . The March works team 's contract with its lead driver , Chris <unk> , was expensive , and Mosley , in his own words , " tried at every opportunity to get rid of him " . He reasoned that Stewart 's highly competitive customer car was enough to show March in a good light . <unk> stayed to the end of the year , but Mosley succeeded in " restructuring " his contract , saving the company some much @-@ needed money . At the end of the season , Mosley successfully demanded full control of the finances , including the factory run by <unk> , who left shortly afterwards . Mosley and Herd borrowed £ 20 @,@ 000 from relatives and friends to support the company into its second year . According to Lovell the money came from Mosley 's half @-@ brother , Jonathan Guinness . 
