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This may help you.. found this by searching this forum...
I have a 2002, 3.0L.....the block heater/frost plug is on the front of the engine next to the oil filter. The oil filter needs to be removed because of the angle that it goes in at. I have changed mine once and given the lack of room to move it was time consuming to install. Also, my block was threaded so I'm not sure if you could use the butterfly style?