WR Tappet Blocks. Made by Flathead Power. These tappet blocks are made to run roller tappets with WR cylinders. Made out of gray cast iron. You will need to get angle ground cam lobes from Leineweber so your lobe angle matches your roller angle. ** You can not run the OEM cam lobes or the solid shoe style WR tappets with these! ** The profile will not work with the roller tappets. 
*These are slightly undersized and will need finish honed.*
 If you purchase the tappets with the blocks, I have a listing with them together. they will be honed to fit. 
Thanks for looking. 
$750 shipped in the USA