Here's mine. I built it out of chevy bumper jack shafts and some swingset tubing. The chrome square tube frame ends are from an Ames Dept store clothing rack.

I built it about 10 years ago. I built it bolt a chevy into it with a 4spd bellhousing and stock (block side) engine mounts. It's still not done. I want to clean it up a bunch and redo the mount setup so it will be universal and bolt up to an Olds, Chevy or whatever else I decide to throw on it, and I'm going to put a real instrument panel on it along with ignition switch, throttle..etc. . I've go a 71 Chevelle fuse block on it to spark everything at once (guages/engine..etc). This is one of the greatest tools I've made for myself. I use it for the inital run to break in the cam and check for problems and leaks..etc. It has proven it's worth no doubt. These are the most recent pics of it with the Engine that is now in my current Nova. I didn't have a 4spd bell to use so I just bolted up the TH350 without a converter and blocked up the tail shaft so the flywheel wouldn't hit the framework. It's lightweight, rolls very easily and nice even fully loaded with an engine and it's a hell of alot stronger than it looks. It's not bulky and looks half decent and I can put it anywhere I want to run the engine. I can mount a radiator on it and exhaust and it's just like it would be in the car, except you don't have to screw around with the "car" in your way