This guy has been selling parts from a NASCAR engine builder shop that closed. Most of it is high end stuff. These look like a deal for $50: http://cgi.ebay.com/ebaymotors/SB-Chevy-Ford-Solid-Flat-Tappet-Lifters-New-No-Res_W0QQitemZ350187239085 I don't know how much the hole for oiling the lobe does, but it is an interesting idea.