I haven't gotten around to installing my hood insulation - it appears simple. However, if anyone knows of a clever and effective way to remove the old, rotten, fetid original insulation I would be very interested; mine looks like tar which has been sprayed with small rocks and dirt and then aged for 15 years. I'm considering pulling the hood and placing it top down on a blanket in the yard and going at it with a 5hp power washer. I suppose I could scrape and pick but it seems like a daunting task.