Here is a picture of the "flipped" air-cooled 773 cubic inch Ranger V12.
It has had significant modifications to the oiling system. I made the intake and the two Holleys replaced the giant updraft Bendix Stromberg unit.
It is not terribly heavy (less than 1000 pounds) it has two overhead cams, 20 pounds of boost and sounds sweet.
I have adapted a Turbo 400 trans and am not sure what it will end up in.
The inertia starter works well but I am also installing a GM 24 volt CUCV starter for a backup as the inertia starters can be problematic and are kinda hard to find.
The engine and trans are approximately 8' long. One option was to install it in the back of a truck ala Dunn's Salt Toy. I know no class exists for a gas powered rear engine truck but in "AA/BG anything" we will be "time only" anyway.
We shall see what happens down the road....
Just so you know though.... Art Dick out od Astoria Oregon, ran a 12V-92 Detroit Diesel in the front of a Ford Supercab pickup.... he sat in the back seat and had room to spare.... a V12 Detroit Diesel is a pretty long engine
Or you could always build a rear engined modified roadster.....
One thing that comes to mind.... the rules used to state unequivocally that any engine used had to be an automotive engine.... DO double check this point as you may find yourself running for time only and it won't matter much what chassis/body you have this engine mounted in.