Thank you. I am just looking for a driver that has plenty of power if I want to punch it ,that it will get up and go. I am not looking to drag race it, not that I wouldn't like to make a CPL runs lol. I honestly had no idea that so much went into building a motor with components that would work best together. I haven't took my rear end apart so I have no idea what I have for gears. I do know that it is a 8 3/4 and limited slip? It was originally a 340 , Ralley package. I have a 2400 Stahl convertor that I was planning on using. I only thought of using stock exhaust manifold s as 73 never had a 440 so I wasn't sure headers would fit or work. Piston choice I was leaving up to the engine builder as I have know knowledge of what is best. I really am thankful for all the responses I have gotten. Thank you .