use the big plug, remove the complete wiringharness from the engine, usually there are a few plugs near the battery. I normally scrapped the shell (or used them on, the dirt track ovals), and left the engine attached to the front subframe, together with the gearbox and lifted the shell over engine instead of pulling the engine out upwards, way to heavy! no need to cut the shell or anything, just loosen the subframe, the steering collumn, the fuel system (you could leave the radiator attatched to the engine, or loosen the hoses and get coolant in your shoes), the front stabiliser and the front struts.
iirc you could as Marc on this forum what plugs you need to disconnect, he knows a lot abouth the cables and such.