I learned many years ago that, "if it ain't broke, don't fix it."
I was changing the oil on my old Kubota diesel and thought how nice it would be to put an air cleaner over the open air intake. After considerable effort I installed a nylon stocking over it and it seemed really tight. Not so much. Turned the engine on and it sucked that nylon stocking into the valves and I had to spend a couple of days cleaning up my mess, and without a new head gasket to boot.