There were several over the years, including a twin engine flat head v8 in the 40's to haul Aircraft parts during the war, one engine drove the front tandem diff the other engine the rear diff.> https://www.macsmotorcitygarage.com/the-thing-with-two-engines-the-grico-twin-motor-ford-truck/ The twin flat 6's you could tell by the wide grill and 3 piece wide windshields. There appears to be several built but not a lot of info on them.
Joie Chitwood in the Fred Peters owned Peters Special #8 car in Gasoline Alley at the 1947 Indianapolis
1960 Badger Midget Auto Racing Assn.Drivers. Billy Wood Champion! A Young Mel Kenyon,middle row on right. Front Row! Billy Wood&Owen Snyder,middle Row! Al Fredenberg Mike Ladd,Duane Hanson&Mel Kenyon. Back Row! Landy Scott,Doug Mowry,Keith Thomas and Gary Congden. I grew up going to Sun Prairie every Sunday for many years, 40+ years, All of theses guys were great racers.