I know that you have to modified the botton of the block in order to use after market rods like the eagle rods tunner toys ect. My question is, Can I do this myself? I told the Machine shop to do it for me and they told me that they have to put the crank with the bearings and then connect the rod in order for them to know. All this is fine, but I have the feeling they are gonna charge an arm and leg since they have to "put the engine together". Can I do this myself, with a rotary grider perhaps? I just want to save money and use it for whatever else I need to finish the project. Thank you guys before hand.