Here's what I use for .049 through .60 size engines. It might accept larger glow fuel engines but .60 is the largest glow engine I've got.

It's made of scrap lumber (2 x 6 and 2 x 4), with an adjustable Tatone cast aluminum engine test stand bolted to the 2 x 6. The whole affair is tightened (using the 2 x 4) into my bench vise, which is located at the end of my work bench near my garage door. The 2 x 4 is bolted onto the bottom of the 2 x 6 with a single carriage bolt (up through the bottom) with a nut and washer on top to tighten down once I've selected the angle I want to set the stand at in relation to the vise/workbench/garage door. When running the engine, I pivot the test stand so the exhaust goes out the garage door. The tank is held on with sheet metal clamps with strips of tire inner tube rubber used as gaskets between the clamps and the tank. The clamps are just the right length so as not to put too much pressure on the plastic tank - the rubber gasket takes up the space so the straps don't cut into or deform the tank.