One) This is probably a ridicoulously stupid question, but how exactly are those step blocks/hold down kits used? I keep seeing them advertised but dont know how you use them/set up a piece with them.
Two) Completely unrelated, anyone have ideas to simply modify a plastic cam shaft. Specifically i'm looking to gain some more valve travel hill-bily style by cutting a small amount off of the section where the tappet rides in the closed position while keeping the lobe itself intact. By replacing stock tappets with loner, the difference in thier resting position to open will be greater thus lifting valves higher. (this is for a lawnmower engine with plastic cam) i should also add i dont have a rotary table and dont plan to buy one, or indeed very much tooling at all, for this project since it is just a jerry-rigged type set up.