Its easy and fun to make your own aluminum hot rod parts. You can be the next Weiand, Offy, or Edelbrock. And you can have the bragging rights that you made that cool part yourself, right in your own shop (or in my case, basement). The Basics To make the master for the casting, the only materials needed are wood (I used aspen), wood glue, bondo, and tools that you likely have in your shop. If you have a few woodworking tools as well, all the better. If you have an idea of a simple sand cast part that youd like to make, the only limitations are that the master you create for the part must be able to be removed from a two-part mold. This means, when you are designing the part, make sure there is a parting line (high spot) somewhere that will allow the master to slip out of the sand molding halves without breaking loose any of the sand. There needs to be a slope or draft to the walls of your part of approximately two degrees. With simple sand casting there cannot be any hollows or porting inside the part, but you can machine those later if required. An intake manifold cannot be made this way, but a valve cover could. You couldnt make a carburetor, but you can make the air cleaner. I had an idea for a bracket to hold a Fram canister fuel filter. Fram supplies a simple folded steel bracket that takes up less room, weighs less, and is probably easier to install. But I thought my part would be neater, so I made one. I wanted something that looks like it could have come from the Edelbrock foundry in its heyday.