Ken Tyrrell
Stewart tested the Matra V12 and found it inferior to the DFV. As a large part of the Tyrrell budget was provided by Ford, and another significant element came from French state-owned petroleum company Elf, which had an agreement with Renault that precluded supporting a Simca partner, Ken Tyrrell had little alternative but to buy a March 701 chassis as interim solution while developing his own car in secret.