hey guy's im just after any information known about installing a flamethrower to my 1000 ute

i have the basic idea on how to do it battery-fuse-switch-ignition coil-lead-spark plug attatched to exhaust oh and either fuel or gas to run into the end of my exhaust too am i right??
and also not too sure on how far away from the end of my exhaust to place the plug???
and which is better petrol of gas?

oh and my exhaust is extractors-2inch pipe which comes out the side just behind door not sure if that varies on where to put the plug?

any help greatly appreciated thanx..