Or just get one of these from Ruppparts. Rupp, Fox, Manco Tecumseh HI- PO thin head gasket hs40 - eBay (item 260383678006 end time Aug-23-09 06:24:37 PDT)
Belt Sander
My buddy has a 6 inch bench mounted belt sander and he takes them down to just about level with the piston/head area. It's about .20 +/- And then he will just give a little relief from the valve pocket in the head between the valve area and the piston with a burr. It's rather unorthodox but it definitely makes a difference. He has a tac on his rototiller and tills around 6000 RPM, LOL he put a strait stack on it as well. He's not all there, but his tiller will definitely get it done. It a old Gilson BTW
My buddy has a 6 inch bench mounted belt sander and he takes them down to just about level with the piston/head area. It's about .20 +/- And then he will just give a little relief from the valve pocket in the head between the valve area and the piston with a burr. It's rather unorthodox but it definitely makes a difference. He has a tac on his rototiller and tills around 6000 RPM, LOL he put a strait stack on it as well. He's not all there, but his tiller will definitely get it done. It a old Gilson BTW