Now that you mention it. I have never seen a 3 wheel version in person. Everyone of them has been a 4 wheel. Had to look it up and you are right, they did have a 3 wheel version. Learn something new every day!
I think if you search up a guy by the name of Jim Little in the USA (he built a 34 ford floppy body dragster with an Allison airplane engine in it called "big Al") he built one of these with an Allison engine in it
Also built other Allison Engine powered vehicles
Very cool car Pat