Eric,
Sorry, Not legal.
As Brad pointed out, it is a different animal. It is also a shaft drive engine.
In theory, this sounds like an interesting idea. Engine could mount in it's original forward facing position. Transmission is a seperate gearbox.
Unfortunately; then you would have to shift the drivers position to the right, and reconfigure the rear end.
I have seen these engines used on offroad buggies with varying success. The problem seems to be in the driveshaft length and alignment.
I had the same idea for my dwarf car project until Rhonda put her foot down and said no way!!!!
I ride a '81 Yamaha XS 1100. Big old HEAVY cruiser!!! Love the old beast; But it weighs right around 1150+ pounds wet and trimmed out.
Lots of torque, low to midrange. Takes a little room to make top speed. Have had mine over 100 mph on the highway.
Has been very reliable; But it doesn't get as much abuse as it would in a race car.
Steve