Small Sand Rail Blueprints Ideas For Small Engine For Dunebuggy/sandrail?

Ideas for small engine for dunebuggy/sandrail? - small sand rail blueprints

I am one of two types of sand rails. I wish I had a front-wheel drive a car (4cyl) and install it on the back of the car, but I did buy a cheap car, with all this.

So what is a good little engine that could be used. I do not know, it can even be driven through the channel. However, I prefer over 1000cc. Remember, then mounted. Other ideas?