I bought a manual because I knew I didn't have the money to spend to fully build a trans. I will race with what I have anyway, but I definitely don't expect to win against an even HP/TQ truck that has an auto that will hold it. If you aren't planning on going with major mods, then get the manual. If you are going to go for big power especially for dragging, get the auto and just build it. I wish I had gotten an auto now....oh well!