I attended our local Ford Model A meeting last week and one member gave a report ( based on an article in the summer issue of the "Dispatcher" magazine. The article was a focus on the competition of Bantam, Ford and Willys to win the Jeep contract from the government.
I then explained how Joe Frazer at Willys had their problematic four cylinder engine upgraded to the point that Willys offered a 100.000 mile drivetrain warranty in 1940. The 134 engine was so far advanced compared to the Bantam and Ford engines that Willys won the contract. Because Ford had such a large production capacity, they ended up producing almost half of the Jeeps during the war. A lot of the parts were interchangeable between the Ford and Willys versions. Some of the Ford Jeeps even had the Willys engine installed, others had the Ford produced 134 engine.