I did the same thing JM did, after a near big lose, I was installing a fresh engine 298 in my 34 three window, mind you this is 1948/50 I was pumping gas and bagging groceries to support my Flathead habit, one nut and lock washer got drop in the intake port. when I could not find the one acorn nut I had laid out to put the carbs on with, hunt as I might , so off came the intake and there it was in the intake port waiting to drop in and damage my fresh built 3/8 stroker . so now I made a cover plate to use when installing...it takes me a while to do things, so this cover plate keeps the lifter valley clean and it looks cool to..... " piece of mind "..... OLD....BILL