Don't pull the coil wire because the cool will still make a spark.
Remove the wire from the ballast resistor, the side where the blue and brown wires that go into one connector at the resistor.
Remove the throttle return spring and the carb stays open a lot easier.
Do this with the engine warm-hot, don't let it cool for an hour.
How's the best way to do a hot test without burning myself or melting a plug wire or compression gauge hose or ??? on a manifold?
Just do the best you can. On my 440 Cuda access to the plugs is a beech. If the engine/headers are hot it's brutal.
There are other cars that you can perform the test on a much warmer engine.
The main thing is you want SOME warmth in the engine. It also ensures the oil rings are well lubed from the recent run, thereby ensuring some oil sealing of the piston/cylinder.
