Looks like a Harley Golf cart to me JM? Oh, you mean the Mustang? Even though we don't often talk about the other cars, many of us here are "Car People" and have multiple makes and models. I have a 67 Firebird Convertible, a 66 Mustang for the wife, a 72 Camaro, a 78 GMC Sprint and longing for a 69 GTO... My first car was a 67 Sprint-6 with a 3-speed, still miss that car!
It's all good. But I agree, that would be something to keep original if at all possible. Yes, Brad's 69 Sprint-6 has a supercharger on it, as brent said it Dynoed at 411HP and still pulling. Not the seat of the pants torque feel you might expect, but impressive in it's own right. (He's finishing a 67 400 4-speed car right now)
Hope with TOHcan & Q's direction you can get a little more out of it to make it enjoyable as a classic cruiser...