Has Anyone Tried This?

I have been working on replacing the timing cover on my 1965 Dart with a 273 engine. Finally have the cover installed, the harmonic balancer on the crankshaft and now I am ready to tighten the crankshaft pulley bolt. Problem is I have been trying to figure out how to keep the crankshaft from turning so I can tighten the bolt.
Was surfing the net and came across a video of a guy using a rope to keep the crank from turning while he torqued the bolt. He removed the number one spark plug, turned the crank until the number one piston was at its lowest point. Then he took one end of a rope and stuffed the rope into the cylinder, leaving a foot or so outside. Then he proceeded to torque the bolt. When it was torqued he then turned the crank the other direction, and pulled out the rope.
Has anyone tried doing this?