Ok, I am building a swing arm fro my 85 Tecate and I was wondering what should I use? I know chromoly is increadibly strong and light but what about aluminum? What thickness should I use for either the chromoly or aluminum! Also what grade? I think I need to say what kind of riding I do also, anything from cruising around the house to mx. Anyhelp would be great as I am going to try to work on this here in the next couple of weeks. Thanks