Here are some previous strings, if you search on colony tappets there is more info.
Colony seems to be the preferred manufacturer, either way make sure the tappet shoulders go all the way across the cam.
https://www.fordbarn.com/forum/showt...colony+tappets
https://www.fordbarn.com/forum/showt...ts#post1870470
https://www.fordbarn.com/forum/showt...ts#post1817029