[HSSS427]

There's certainly a bit of art, and a lot of luck in this process. The bore scope helped but it is not the easiest thing to use and it took me at least an hour to get a decent look into just 2 of the cylinders. Got lucky in that I found it on the second cylinder I looked at and still wasn't convinced I'd seen enough of the other cylinders to be comfortable I hadn't missed something. My suggestion is that if you get, rent or borrow a borescope, get one with the widest perspective you can get ie closest to 180 degrees. Mine had a 40 degree range and I spent a lot of time just lookinf at intake walls from about a 1/4" away.

Ron61 - your note gave me an idea. How about installing a magnet in the base of the intake so that it grabs anything metal before it goes down the runners? Kind of like the magnets in the bottom of the tranny case. I know it's probably not this simple as it would impact the flow characteristics of the intake if not done properly. Maybe put a bit old sheet magnet on the bottom side of the intake and it would catch stuff fallling in the intake, and perhaps metal debris splashing around in the intake valley!