My desire is to be able to create models like this in MOI3D with the intent to 3D print them and then detail them using parts from 1/24 / 1/25 scale car model kits (made by AMT, Revell, Monogram, MPC, JoHan, etc).

Supped up Ford Flathead V8 to be used to power an American hot rod. Modeled in Hexagon. I did not use any blueprints or reference image. I used a 1/8 diecast model I own of a stock flat head then added the super charger and tri-carbs which I modeled from reference images.

I hope this gives you an indication of what I am trying to accomplish in MOI3D. I think the engine, chassis/frame, suspension parts, etc would be easy. It is the body that has me stymied.