Finally getting to put my flathead V8 together and as I sort through the gasket set I find these white pieces of rope packing. It has been three or four years since I tore this engine down and I don't remember seeing where these would go Anybody know what they are and where they go? They are about three inches long and a half inch in diameter.

I already have located the graphite rope packing for the front & rear seals.

Thanks for any help