This really works. Shitloads of smoke guarenteed.
Disconnect radiator, dry-crank the engine a couple of times so the water pump, pumps all the water out. Remove oil drain plug and drain oil. Start vehicle up and start bouncing her off the rev-limiter or just plan floor it for a carby and HOLD.
Voila. Get trated to Picton slap, big eng knock, pre-det, valvs bending, rocker arms twisting, crank walking. A real aural and visual delight.
p.s: For best results, remove exhaust manifold completely.